Heat Demand Control Wiring; Figure 25: Thermostat Control Wiring Diagram - HeatRite VM-80 Installation, Operation & Service Manual

VM-S I , O
ERIES NSTALLATION PERATION AND

10.5 Heat Demand Control Wiring

The heater input can be controlled by any one of the
following heat demand control devices (control
devices are wired to central heaters only):
10.5.1 Zone Sensor
The zone sensor (P/N 10081530) offers automatic
control of heater input. Heater(s) modulates based
on difference between sensed air temperature and
the temperature setpoint. Heater modulation in
response to air temperature changes is immediate.
Setpoint is adjusted with the slide bar adjustment at
the bottom of the sensor. ON/OFF switch (used to
disable heater operation or reset heater from lockout)
is located on the side of the sensor. See Page 41,
Figure 21 for wiring details.
10.5.2 Thermostat
A thermostat offers automatic control of heater input.
The heater control is designed for use with a
standard 2-wire or 4-wire low voltage electronic
thermostat (not for use with thermostats that have a
heat anticipator). Typical wiring connects the R and

FIGURE 25: Thermostat Control Wiring Diagram

CENTRAL HEATER CONTROL
T
THERMOSTAT
W R
T24
T25
T26
T27
T13
T14
T15
T16
T17
T18
T19
T28
T29
T30
T31
MODULATION CONTROL WIRING
TO SATELLITE HEATERS
* Separate on/off switch is optional for "satellite" heaters (install at user level).
On/Off switch is used to disable heater operation or reset a heater that is in "lockout" mode.
If on/off switch is not desired, leave jumper wire between R and W terminals in place.
46 of 71
S M
ERVICE ANUAL
R
W
J10 JUMPER POSITION
SHOWS "CENTRAL"
DESIGNATION AND
"THERMOSTAT"
CONTROL METHOD.
J10
W wires to the heater control and does not connect
the Y (cooling) and G (fan) wires to the heater
control.
The heater can be used with thermostat, 24V (p/n
90425100) if set to 5 cycles per hour. Any other
electronic thermostat without heat anticipator can be
used if set to 5 or 6 cycles per hour.
On the control, the T24 and T25 (R and W) terminals
supply 24 V to power an electronic thermostat. See
Page 46, Figure 25 for wiring details. Consult the
factory for other thermostat wiring configurations.
Heater(s) modulates based on heater and thermostat
cycle timing, history and desired setpoint by using a
pre-programmed algorithm. When using thermostat
control, heater modulation response to rapid air
temperature change is not immediate. Thermostat
control is not recommended for use in areas with
frequent or high air changes.
It is important to note that during normal operation,
heater cycle continues beyond meeting thermostat
setpoint.
SATELLITE HEATER CONTROL
*OPTIONAL
SWITCH
THERMOSTAT
T24
R
T25
W
T26
T27
T13
T14
T15
T16
T17
T18
T19
T28
T29
T30
T31
J10
J10 JUMPER POSITION
SHOWS "SATELLITE" DESIGNATION.
MODULATION CONTROL WIRING
TO ADDITIONAL SATELLITE
HEATER CONTROL TERMINALS
T28 AND T29.