Adjustment And Testing - Honeywell VC Series Installation Manual

Adjustment and Testing

Manual Opener
The manual opener can be manipulated when in the up
position. The motorized valve can be opened by firmly
pushing the red manual lever down to midway and in (only
possible if the actuator is in the upper position). This holds all
ports in the open position, and with auxiliary switch models
the NO switch is closed. Ports A and B of 3-way valves are
opened. This 'manual open' position may be used for filling,
venting or draining the system, or for opening the valve in
case of power failure. The valve can be restored manually to
the closed position by depressing the red manual lever lightly
and then pulling it out. The valve actuator returns to the
automatic position when power is restored.
Checkout
1. Raise the set point of the thermostat above room tem-
perature to initiate a call for heat. Valve position indicator
should move downward to the open position.
2. For all auxiliary switch models, monitor the control de-
vices. 2-way valve: check that the valve opens, the auxil-
iary switch (if present) closes, and at the end of the open-
ing stroke the circuit to the circulator or another valve is
made. 3-way valve: check that port A opens, port B
closes, the auxiliary switch (if present) operates, and at
the end of the opening stroke the circuit to the circulator or
another valve is made.
3. Lower the set point of the thermostat below room tem-
perature.
4. Observe the control devices.
2-way valve: check that the valve closes and all auxiliary
equipment stops.
3-way valve: check that port A closes and all auxiliary
equipment stops.
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Service
WARNING
This valve should be serviced by a trained,
experienced service person.
1. If the valve is leaking, drain system or isolate valve from
the system.
2. Check to see if the cartridge needs to be replaced.
3. If the gear train or the motor is damaged, replace the
actuator assembly.
NOTE: Honeywell hydronic valves are designed and tested
for silent operation in properly designed and in-
stalled systems. However, water noises may occur
as a result of excessive water velocity. Piping noises
may occur in high temperature (over 100
with insufficient water pressure.
VC SERIES
°
C) systems
EN0H-0327GE25 R0206