Bell & Gossett V01348H Comfort Trol Zone Control Valve - Manual (Page 2)

NOTE: After power is restored, return the Comfort-Trol to normal
operation by:
1. Assembling the operator to the valve by installing the operator over
the bonnet assembly and pressing down until the wire form tabs
both engage the slots on the bonnet assembly. This is the reverse
of the process used to remove the operator from the Comfort-Trol.
Do not squeeze the two formed release tabs when reassembling
the operator to the Comfort-Trol.
2. Turn the power switch for the Comfort-Trol to the ON position.
2
INSTALLATION INSTRUCTIONS
The B&G Comfort-Trol Zone Valve can be installed horizontally or ver-
tically. However, the following precautions should be taken: When
installing the valve in a vertical position, the electrical connections
must be at the top of the operator. On chilled water applications the
operator should be above the pipe centerline. If the valves are
installed near the boiler, locate them a sufficient distance from the
breeching so they are not affected by flue temperatures.
1. Remove the brass bonnet and retainer assembly from the valve
body as shown in Figure 3.
NOTE: Model with flare connectors can be left assembled if
Comfort-Trol is removed from piping before soldering connectors
in place.
2. Solder the valve body into position with the arrow on the body
pointing downstream.
a. Clean the tube ends and Comfort-Trol valve body connections
thoroughly.
b. Use 95-5 (Tin-Antimony) solder, a good grade of flux and a torch
with a sharp pointed flame.
3. Insert the bonnet assembly with retainer into the valve body and
secure with the two retaining screws. Be careful not to damage the
O-ring seal when inserting the bonnet assembly (Fig. 3, Item A). If a
lubricant is required, apply silicone grease to the bonnet assembly
below the retainer. Do not use lubricants with a petroleum base.
4. Check solder connections for leaks. If resoldering is needed,
remove the bonnet assembly and resolder.
5. Assemble the Comfort-Trol operator onto the valve body (the oper-
ator can be rotated 360° after it is installed) by pushing down on
the operator until the wire retainers into the operator frame (Fig. 3,
Item E) snap into the retaining groove on the brass bonnet (Fig. 3,
Item C).
6. Electrically wire the Comfort-Trol to the system as described in one
of the following wiring diagrams.
FIGURE 2A
1, 2 OR 3 COMFORT-TROLS – SINGLE TRANSFORMER
INTERMITTENT PUMP OPERATION
FIGURE 2B
COMFORT-TROL AND MODUMATE WIRED
TO THE SAME TRANSFORMER
INTERMITTENT PUMP OPERATION
FIG. 1
WARNING: Damage to Comfort-Trol body or bonnet may
occur from improper installation, which can cause leakage
or failure of Comfort-Trol.
a. Avoid excessive use of flux and solder when installing Comfort-
Trol in a vertical position because damage to the valve seat
may occur.
b. When soldering the joints, direct the flame with care to avoid
subjecting the valve body to excessive heat.
c. Allow the valve body to cool below 100°F before installing the
bonnet and retainer assembly.
Failure to follow these instruction could result in serious personal
injury or death and property damage.
CAUTION: Transformer overload. Do not wire more than
three Comfort-Trol or Modumate Zone Control Valves to
one 40 VA Transformer. Failure to follow these instructions could
result in property damage and/or moderate personal injury.
OPERATING INSTRUCTIONS
The Comfort-Trol is opened by a heat motor, therefore, there is
approximately a two minute period between the time the thermostat
closes, calling for heat, and the time the Comfort-Trol opens. As long
as heat is required, the Comfort-Trol is kept in the open position by a
built in control switch, which meters small amounts of electricity to the
Comfort-Trol heat motor. When the thermostat opens, indicating that
the need for heat has been satisfied, a return spring in the Comfort-
Trol slowly closes the Comfort-Trol.
MANUAL OPERATION
A power failure may necessitate manual operation of the Comfort-Trol.
If required, please follow these instructions:
1. Turn the switch bringing power to the Comfort-Trol operator to the
OFF position.
2. Squeeze the two formed wire release tabs together and lift up to
remove the operator. See Figure 3.
3. The valve is now fully open and will allow gravity circulation
through the system.
Note: When two circuits are used in a
single zone, always join the circuits to
a common return as shown in Figure 1.
There can be no flow in circuit 1 or 2
when the zone valve is closed.
Note: This transformer
must be dedicated to
Comfort-Trol use only.
No other controls are
to be powered from it.
Improper operation of
Comfort-Trol will result.
Note: Terminal 3 is not
used if a continuously
operating pump is used.
IMPORTANT: Figure 2B is correct
only when the ModuMate was wired
per factory recommendations.
See Transformer
Note in Fig. 2A
Note: Terminal 3 is not
used if a continuously
operating pump is used.
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