Installation & Maintenance Data
IM 737
Group: Fan-coil
Part Number: 106332800
Date: May 2002
Electric Valve Package Kits for
THC Series Fan-coil Units
Installation and maintenance are to be performed only by qualified personnel who are familiar with and in compliance with state,
local and national codes and regulations, and experienced with this type of equipment. Caution: Sharp edges and coil surfaces
are injury hazards. Avoid contact with them.
The electric valve package kits are furnished completely soldered and leak tested at the factory. Four (4) solder connections
are required to complete the installation of the valve package
into the system (two at the coil supply and return connections
and two at the supply and return runouts).
!
The electric valve is to be in the open position, and ball valves
in the closed position while soldering. Do not move the valve
handles until the tubing has cooled for three (3) minutes.
Installation
1.
2.
Clean all connections before assembly with fine sandpaper.
A good grade solder flux will help ensure a proper bond. A
general purpose 50/50 solder is recommended. Do not
silver solder or braze the valves or copper fittings in this
kit. A chill block, or equivalent, must be used to prevent leaks
in the factory connection or overheating the valve.
Position the valve package on the unit by moving the kit piping slightly. Do not try to move the coil connections.
!
WARNING
To prevent electrical shock, disconnect electric power to
system at main fuse or circuit breaker box until installation is
complete.
CAUTION
3.
A hydrostatic test on all piping is recommended after all connections are complete.
4.
Field wiring must be in accordance with local codes and/ or
the National Electrical Code. Wiring should be routed to prevent the possibility of condensate dripping from the valve
package piping onto the electrical conduit.
Figure 1.
Manual
Operating
Lever
Release
Button
Mating Hole
Valve Actuator Installation
Stem
Latch the manual operating lever in the engaged position (N.C. only). Depress the release button (See Fig. 1). Align
the body with the actuator to ensure the stem is inserted into the
large mating hole on the bottom side of the actuator. Engage the
actuator on the body and release the button. Actuator AG2 is
used for normally open operation. Actuator AG1 is used for normally closed operation.
MH7186
MH25807
Figure 2.
Mounting
360°
90°
A
90°
B
The PopTop™ valve can be mounted vertically or horizontally. If
mounted horizontally, the valve should be mounted within 90° of
upright position (See Fig. 2). If mounted vertically, care should be
taken to ensure moisture does not drip onto motor. The valve
actuator should not be mounted upside down.
Vertical
®
4900 Technology Park Boulevard •
Upside Down
Auburn, New York 13021-9030 • 800-432-1342 • www.mcquay.com
IM 737 Pg 1 of 6
©2002 McQuay International
THC Series 2-Way, 2-Pipe Valve Assembly - Left Hand Unit Shown
Figure 2-1. - Top View
Figure 2-3.
A ir
F lo
w
Return Ball Valve
Control Valve
Actuator
Coil Connect
1/2" Copper x MPT
Adapter
Supply Gate Valve
Figure 2-2. - Front View
Coil Return
Figure 2-4. - End View
Coil Supply
Figure 2-5. - Wiring For THC Series 2-Pipe Heating/Cooling With Automatic Changeover
Legend
Wire No.
16
WHT
ORG
Wire Color
Wire Connector
CLG
BLU
Wire Connector
Field Connector
BLU
C/O
TCI
RED
HTG
RED
BLK
BLK
V
WHT
CLG
Cooling
HTG
Heating
TCI
Thermostat
V
C/O
IM 737 / Page 2 of 6
Valve
Change over Switch
(Manual or Auto)
©2002 McQuay International
THC Series 3-Way, 2-Pipe Valve Assembly - Left Hand Unit Shown
Figure 3-1. - Top View
Figure 3-3.
w
Flo
Air
Return Ball Valve
Control Valve
Actuator
Coil Connect
1/2" Copper x MPT
Adapter
Supply Gate Valve
Figure 3-2. - Front View
Coil Return
Figure 3-4. - End View
Coil Supply
Figure 3-5. - Wiring For THC 2-Pipe Heating/Cooling With Automatic Changeover
Legend
Wire No.
16
WHT
ORG
Wire Color
Wire Connector
CLG
BLU
Wire Connector
Field Connector
BLU
C/O
TCI
RED
HTG
RED
BLK
BLK
V
WHT
CLG
Cooling
HTG
Heating
TCI
Thermostat
V
C/O
IM 737 / Page 3 of 6
Valve
Change over Switch
(Manual or Auto)
©2002 McQuay International
THC Series 2-Way, 4-Pipe Valve Assembly - Left Hand Unit Shown
Figure 4-3.
Figure 4-1. - Top View
Control Valve Actuator
w
Flo
Air
Coil Connect
1/2" Copper x MPT
Adapter
Return Ball Valves
Supply Gate Valves
Figure 4-2. - End View
Figure 4-4. - Front View
7.52" (191mm)
11.67" (296mm)
.77" (20mm)
Coil
Return
6.75" (171mm)
Coil Return
Coil Supply
Coil Supply
Figure 4-5. - Wiring For THC Series 4-Pipe Heating/Cooling
Legend
16
WHT
Wire Color
Wire Connector
ORG
WHT
CLG
CLG
BLU
BLK
V
HTG
HTG
RED
BLK
V
Wire Connector
WHT
TCI
IM 737 / Page 4 of 6
Wire No.
Field Connector
CLG
Cooling
HTG
Heating
TCI
Thermostat
V
WHT
C/O
Valve
Change over Switch
(Manual or Auto)
©2002 McQuay International
THC Series 3-Way, 4-Pipe Valve Assembly - Left Hand Unit Shown
Figure 5-1. - Top View
Figure5-3.
w
Flo
Air
Return Ball Valves
Control Valve
Actuator
Coil Connect
1/2" Copper x MPT
Adapter
Supply Gate Valves
Figure 5-4. - Front VIew
7.69" (195mm)
Figure 5-2. - End View
.77" (22mm)
9.04" (230mm)
6.83" (173mm)
Coil Return
Coil Return
Coil Supply
Coil Supply
Figure 5-5. - Wiring For THC Series 4-Pipe Heating/Cooling
Legend
16
WHT
Wire Color
Wire Connector
ORG
WHT
CLG
CLG
BLU
BLK
V
HTG
HTG
RED
BLK
V
Wire Connector
WHT
TCI
IM 737 / Page 5 of 6
Wire No.
Field Connector
CLG
Cooling
HTG
Heating
TCI
Thermostat
V
WHT
C/O
Valve
Change over Switch
(Manual or Auto)
©2002 McQuay International
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.mcquay.com.
®
4900 Technology Park Boulevard •
Auburn, New York 13021-9030 • 800-432-1342 • www.mcquay.com
IM 737 Pg 6 of 6 (5-02)
©2002 McQuay International