MartinLogan VENT-FREE FIREPLACE SYSTEMS 33ISDG - Manual (Page 20)

20 23D8036
ELECTRICAL WIRING (MILLI-VOLT)
A. COMPLETE MILLIVOLT SYSTEM CHECK
(“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON)
a. If the reading is more than 100 milli-volts and the automatic valve still does not come on, replace the control.
b. If the closed circuit reading (“A” reading) is less than 100 millivolts, determine cause for low reading, proceed to
Section B below.
B. Thermopile Output Reading Check
(“B” Reading - Thermostat contacts OPEN - Main burner OFF)
1. Check gas pressure to the unit. If gas pressure is within minimum and maximum on data plate, then check pilot
voltage, 325 millivolts minimum. If the minimum milli-volt reading is not obtainable, replace pilot.
CONNECT
METER SWITCH OR METER
CHECK TO LEADS TO THERMOSTAT READING
TEST TEST TERMINALS CONTACTS SHOULD BE
A COMPLETE 2 & 3 CLOSED CLOSED
SYSTEM
B THERMOPILE 1 & 2 OPEN OPEN
OUTPUT
CHECKING SYSTEM OPERATION
The milli-volt system and individual com-
ponents may be checked with a milli-volt
meter having a 0-1000 mV range. Conduct
each check shown in chart below by con-
nection meter test leads to terminals as
indicated.
CONNECTING REMOTE RECEIVER (Figure 21)
THESE INSTRUCTIONS SUPERCEDE THE SECTION
ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT
HAND-HELD REMOTE INSTRUCTIONS SUPPLIED
WITH THE REMOTE.
1. Remove cover on control panel to show opening for remote
receiver.
2. Connect the remote connectors located in the unit.
3. Slide remote receiver in the opening of control panel. Use
two screws provided to attach remote receiver to the control
panel.
4. Replace Cover.
NOTE: Do not place remote in combustion chamber.
Figure 21 - Installing Remote Receiver
Remote
Receiver
Cover