Roberts Gorden Vantage HEM-80 Installation, Operation & Service Manual page 58

HEM-S I , O
ERIES NSTALLATION PERATION AND
10.4.9 Potentiometer Control Device
Potentiometer (10K Ohm"Linear Taper") device offers
manual control over heater(s) firing rate. This type of
potentiometer can be found at a typical electrical
supply retailer. Potentiometer dial position directly
dictates heater(s) firing rate. Dial positions range
between "Min" and "Max". Minimum and maximum
heater firing rates (inputs) are marked on the heater's
rating plate. ON/OFF switch or thermostat is used to
disable heater operation or reset heater from lockout.
FIGURE 31: Potentiometer Control Wiring Diagram
ON/OFF SWITCH
CENTRAL HEATER CONTROL
or THERMOSTAT
THERMOSTAT
T24
T25
T26
T27
T13
T14
POTENTIOMETER
(10K Ohm)
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.
54 of 80
S M
ERVICE ANUAL
R
W
J10 JUMPER POSITION
SHOWS "CENTRAL"
DESIGNATION AND
"POTENTIOMETER"
CONTROL METHOD.
A B
J10
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.
A B
MODULATION CONTROL WIRING
TO ADDITIONAL SATELLITE
HEATER CONTROL TERMINALS
T28 AND T29.