HVAC

HVAC Overview

Lower School

Many rooms in the original building (Lower School) are served by hot water boilers in Room 114. This boiler supplies an air handler in Room 119. This air handler provides HVAC for the LS Lobby, Pod & Music Room, in conjunction with the Trane ACU outside the Maintenance door. These units are integrated into the iVu controls system.

Rooms 200 through 212 are served by gas FA furnaces in Rooms 202, 208, and 214. Each furnace has a separate condensing unit. These units are not yet (as of 2/21) integrated into iVu and instead have individual TCS Basys thermostats which are updated via laptop connection to the individual thermostat.

Rooms 216 through 222 are serviced by a gas FA furnace in Room 222C and a single condensing unit. Each room has an electric damper and a radiant heat (electric) panel and is integrated into the iVu system. This system is noisy and is a source of complaints. The future remedy to this issue may come from a different type of system, such as a ductless, mini-split system or a VRF system.

Rooms 226A and 232 have gas FA furnaces (in Rooms 228A and B) and individual condensing units. 226A has a TCS Baysys thermostat while 232 was upgraded to an iVu-compatible Carrier thermostat in January 2021.

Room 230C has a through-the-wall PTAC (motel style) heating and cooling unit.

Room 101 has a gas FA furnace, located in Room 101C, an individual condensing unit, and a TCS Basys thermostat.

Room 102 has a Trane unit ventilator, it’s own condensing unit and a Trane thermostat without any connection to controls or ability to monitor or adjust.

Rooms 103, 106, and 110 have a furnace/air handler with hot water coils supplied via the boiler in Room 114 and individual condensing units. Room 103 has a Honeywell thermostat without monitoring or control while 106 and 110 have TCS Basys thermostats.

Room 112 has a gas FA furnace, located in Room 112C, an individual condensing unit, and a TCS Basys thermostat.

Room 116 has two through-the-wall PTAC (motel style) heating and cooling units.

Rooms 118 and 120 are served by a gas FA furnace in Room 120D, a single condensing unit, and is tied into the iVu system.

Room 125 is supplied via a furnace with electric heat, located in Room 127. It has an individual condensing unit and has a TCS Basys thermostat.

Rooms 129 and 131 are supplied via a furnace/air handler with hot water coils supplied via the boiler in Room 114 and an individual condensing unit. There is a TCS Basys thermostat in Room 129 for both spaces.

Room 133 (The Hub) has its own RTU with an ERV and is connected to the iVu system.

2005 Addition

HVAC for this addition is handled via hot water boiler in the mechanical room, Room 20, and an RTU accessible via Room 239B. This system also has an ERV. RTU for classrooms does not include gas heat (as backup). Individual spaces are controlled through a VAV system that connects to iVu.

Gym

HVAC for the gym is handled via a gas-fired RTU accessible via Room 239B. This system also has an ERV. This system connects to iVu.

2016 Addition

HVAC for this addition is handled via hot water boiler in the mechanical room, Room 248, and an RTU accessible via Room 248. This RTU includes gas heat (as backup). Individual spaces are controlled through a VAV system that connects to iVu.

HVAC Equipment Inventory

RTUs & ERVs

	Location	Manufacturer	Model #	Serial #	BTUs	Tons Cooling	Rooms served	Year
RTUs	Outside Cafeteria	Carrier	48TCEE20B2A5A6U0J0	2919P22240	310000	17.5	Cafeteria	2020
	Roof 2005 Addition	Carrier	50AY-840-F-511EQ	2405F16773	N/A	40	2004 Addition	2005
	Roof 2005 Addition	Carrier	48HGF028-FC-5112P	2905G10022	400000	25	GYM	2005
	Roof 2016 Addition	Carrier	48A3T640AR-52AHP	2516U47618	800000	40	2016 Addition	2016

ERVs	Outside Cafeteria	Renew Aire	HE3X5T	H194051C			Cafeteria	2020
	Roof 2005 Addition	Micro Metl	ERVC-6068-H23QP9				2005 Addition	2005
	Roof 2005 Addition	Micro Metl	ERVC-5060-H23Q09				GYM	2005
	Outside K Hallway	Lossnay	HE 2X900RT	HD04169			K, 129, 131	2001

Furnaces, Fan Coils & AHUs

Location	Manufacturer	Model #	Serial #	Type of unit	Rooms served	Condensate pump	Condensing Unit	Coil type(s)	Year
120D	Carrier	59SC2C080S211120	0616A60817	FA Furnace	120A,B&C, 118	Yes	1E	DX	2016
127	Trane	TWE036C140B0	R346P111V	Fan Coil	129, 131	No	15W	Water	2000
127	Trane	TWE036C140B0	R305T2Y1V	Fan Coil	125	No	14W	Electric	2000
112C	Trane	TUX040C924C0	N314RE17G	FA Furnace	112	No	3E	N/A	1998
108B	Trane	TWE036C140B0	Z105LB82V	Fan Coil	106, 108	No	4E	Water	2001
108B	Trane	TWE036C140B0	Z105L2B1V	Fan Coil	110	No	5E	Water	2001
105A	Trane	TWE036C140B0	Z105L2E1V	Fan Coil	103	No	12W	Water	2001
101C	Trane	TUX060C936C2	R303P0P7G	FA Furnace	101	No	9W	N/A	2000
228B	Trane	TUX100C960C0	N353J687G	FA Furnace	232	No	17W	N/A	1998
228A	Trane	TUX100C960C0	N353KCE7G	FA Furnace	226	No	16W	N/A	1998
222C	Carrier	59SC2C060S171116	0316A61342	FA Furnace	222A&B, 220A&B, 218A&B, 216	Yes	2E	DX	2016
214	Trane	TUX060C936C0	N3230997G	FA Furnace	212	Yes	13W	N/A	1998
208	Trane	TUX060C936C0	N353T3E7G	FA Furnace	210	Yes-Shared	11W	N/A	1998
208	Trane	TUX060C936C0	N332LRJ7G	FA Furnace	206	Yes-Shared	10W	N/A	1998
202	Trane	TUX060C936C0	N332LS77G	FA Furnace	204	Yes-Shared	7W	N/A	1998
202	Trane	TUX060C936C0	N326JCW7G	FA Furnace	200	Yes-Shared	8W	N/A	1998
119	Trane	CSAA35UAL00	K16E40625	AHU	LS Lobby, Pod & Music	No	Outside Maintenance	DX(X1),Water (X4)	2016
102	Trane	VUVC1251BA0FACBY1AA11CG100001310	W00J47445	Unit Ventilator	102	No	6E	N/A	1999

Condensing Units

Location	Manufacturer	Model #	Serial #	Rooms served	Year
1E	Carrier	24ABB342A500	1616E28109	120A,B&C, 118	2016
2E	Carrier	24ABB324A310	1716E10398	222A&B, 220A&B, 218A&B, 216	2016
3E	Trane	TTP024C100A3	N304LBGff	112	1998
4E	Trane	TTB036C100A2	R4626BTBF	106, 108	2000
5E	Trane	TTB036C100A2	R4626B8BF	110	2000
6E	Trane	TTB030C100A2	R372N2XBF	102	2000
7W	Trane	TTP024C100A3	M1218HTFF	204	1997
8W	Trane	TTP024C100A3	N2445JHFF	200	1998
9W	Trane	TTB036C100A1	P501285BF	101	1999
10W	Trane	TTP024C100A3	N264L59FF	206	1998
11W	Trane	TTP024C100A3	N264NEHFF	210	1998
12W	Trane	TTB036C100A1	P433KA6BF	103	1999
13W	Trane	TTP024C100A3	N264MFHFF	212	1998
14W	Trane	TTB036C100A1	P5013UXBF	125	1999
15W	Trane	TTB036C100A1	P5013RXBF	129, 131	1999
16W	Trane	TTA042C300A1	N293MHJBF	226	1998
17W	Trane	TTA042C300A1	N293MFKBF	232	1998
Outside Maintenance	Trane	RAUJC50ECC10ABDF00020S	C16E03378	ls Lobby, Pod & Music	2016

Boilers

Location	Manufacturer	Model #	Serial #	BTUs	Rooms served	Year
114	Weil-McLain	EVG 399	CP7486228	333000	LS Pod, Music & Lobby; 102, 103, 106, 108, 110, 112, 129, 131	2016
114	Patterson-Kelley	N-1700-2	CK-17-99-10596	1700000	LS Pod, Music & Lobby; 102, 103, 106, 108, 110, 112, 129, 131	1999
20	Thermal Solutions	EVA0750BN1-UABM	64801493	750000	2005 Addition	2005
248	Lochinvar	KBN400	1606102439591	324000	2016 Addition	2016

Circulating Pumps

Location	Manufacturer	Model #	Serial #	Rooms served	Year
114	Grundfos	UP-26-99-BF	N/A	LS DHW Recirc.	2012
114	Taco	0013-F3	N/A	Weil-McLain boiler	2016
114 (#1)	Bell & Gossett	172760LF	F14K270046	LS Boilers Distribution	2016
114 (#2)	Bell & Gossett	172760LF	L15K70019	LS Boilers Distribution	2016
20	Bell & Gossett	NBF-12F/LW	103260 L40	2005, 2016 DHW Recirc.	2005
20	Taco	121A3E1 4.3	N/A	Thermal Solutions Boiler	2005
20	Taco	1635C3E2 5.9	N/A	2005 Boiler Distribution	2005
20	Taco	1635C3E2 5.9	N/A	2005 Boiler Distribution	2005
248	Taco	0013-F3	N/A	Lochnivar Boiler	2016
248-#1	Taco	1915 E 1 E 1	N/A	2016 Boiler Distribution	2016
248-#2	Taco	1915 E 1 E 1		2016 Boiler Distribution	2016

Water Heaters & Softeners

	Location	Manufacturer	Model #	Serial #	Rooms served	Year
Heaters	114	A.O Smith (#3)	BTH-250-100	1231M000120	LS	2012
	20	A.O Smith (#1)	9280842000	MB040006136	2005, 2016	2005
	20	A.O Smith (#2)	BTH-150 300	1934116088530	2005, 2016	2019

Softeners	114	Hellenbrand	Pro Mate 6.0	HB099034	LS	2019
Softeners	20	Water Right	IMLC-1665B-03-00-00-00-00	054258	2005, 2016	2004

HVAC Controls

iVu

The 2005 addition, 2016 addition, LS Pod, Lobby and Music Room, Admin Wing Rooms (216-222), Tinker Space and Student Services (118-120), and Rooms 226 & 232 (K) are all controlled through a Carrier iVu controls program. The controls are accessible via the following IP address:

172.20.0.184:8080
user: rseaver
pass: mcds5606

The menu on the left has items listed that can be clicked to show a graphic representation, with temperatures in the right pane. Some items require expanding the caret next to the name to view all items or rooms.

Scheduling occurs via the Scheduling Groups dropdown menu in the left pane. Most scheduling is currently set and operating as desired. There are some instances when an Override may be necessary. These would include:

Cold weather: This should be used to override the entire building in extremely cold weather periods. Click on “Override All”, click on “Schedules” in the top menu, then “Configure”>>”Add”>>”Priority” = “Override”, “Type” = “Date Range”, add a “Description”, select Start and End dates from the calendars, drag the slide bar (or type in) the hours (in this case, 12AM to 12PM), then click “Accept”
Events: This should be used to override specific areas of the building for events. Click on an area to be overridden in the left menu. Then click on “Schedules” in the top menu, then “Configure”>>”Add”>>”Priority” = “Override”, “Type” = “Date” (or Date Range, Date List, etc), add a “Description”, select the date from the calendar, drag the slide bar (or type in) the hours (usually 6PM to event end time), then click “Accept”. Note: An override category for home games in the Gym already exists in the scheduling tree. Add necessary dates for home games utilizing “Date List” as the “Type”
Admin Holiday Override: For scheduled holidays (see below), when Admin or other staff may be in the building working, this override can be set to heat or cool only Admin offices. Click on “Admin Holiday Override” in the left menu. Then click on “Schedules” in the top menu, then “Configure”>>”Add”>>”Priority” = “Override”, “Type” = “Date” (or Date Range, Date List, etc), add a “Description”, select the date(s) from the calendar, drag the slide bar (or type in) the hours (usually 7AM to 5PM), then click “Accept”

Holidays are used to turn the systems off completely during times when the building will be vacant. This should be used with some caution. For example, turning the system off over Winter Break would have tremendous savings, however, if temperatures are predicted to reach below 0F, it would not be advisable to set a holiday schedule for that time to avoid mechanical failures or pipe freeze and burst incidents. To set up Holidays: Click on “Holidays” in the left menu. Then click on “Schedules” in the top menu, then “Configure”>>”Add”>>”Priority” = “Holiday”, “Type” = “Date” (or Date Range, Date List, etc), add a “Description”, select the date(s) from the calendar, drag the slide bar (or type in) the hours (usually 7AM to 5PM), then click “Accept”. Multiple holidays can be added by clicking “Add”>>”Priority” = “Holiday”, “Type”, etc.

iVu Manual

TCS Basys

Most LS classrooms are not connected to iVU (as of 2/21) and the control resides within each room’s thermostat. These thermostats are manufactured by TCS Basys and require programming via a laptop that has the TCS Insight program installed (downloaded from the TCS website). The laptop is connected to the thermostat with a serial repeater that lives in the Maintenance office. The USB cable is plugged into the laptop and the RJ cable is plugged in the port on the bottom of the thermostat.

With the TCS Insight program open, start on the “Port” tab, located under the “Network” tab. In the “Com Ports” window, make sure the listed port is selected. If no ports are listed, try “Get Ports” or “Open Ports”.

Once the “Com Port” is selected, click on the “Poll” tab. When it first opens, it will not have any info in the boxes, but otherwise looks like the image below. Enter the room number (of the room that you have the cable plugged into the thermostat) in the “Start Address” box on the right-hand side. Click the “Poll Network” button on the right and the “Polling” bar on the bottom should start to animate. Once the program finds the thermostat, a thermostat graphic will appear in the bottom pane.

To reset the time on the thermostat (which is the most common problem with these thermostats), click on the “Schedules” tab, then the “Date and Time” tab. Click the “To PC Time” button below the “Time” box, then click the “Write” button to ensure that the thermostat day and time are updated. See the below example.

To check or change the Occupied Schedule, click on the “Schedules” tab under the main “Schedules” tab. The LS rooms are typically set to “Occupied” from 7 AM to 5 PM, weekdays only. If any changes are made, make sure to click the “Write Schedules” button at the bottom of the window.

The last portion that may need attention is “System and Setpoints” under the “Programming” tab. “User Setpoint Adjust” should be set to two or three degrees. This allows the occupant to turn the temperature either up or down by the amount set here. Also, heating and cooling setpoints can be adjusted for the “Occupied” schedule set via the previous section and the “Unoccupied” schedule (all times that are not listed as “Occupied”). The “System”>>”Mode” should be set to “Automatic” and the “User Access System Switch” checkbox for “Enable” should NOT be checked. Click the “Write Page” button to save any changes.

TCS Basys manual

HVAC Replacement Spreadsheet