Honeywell Q340A Installation Instructions

APPLICATION
The Q340A Thermocouple is a single-junction
thermocouple lead which provides a 30 mV electrical
signal when the pilot is operating. Loss of the pilot
removes the electrical current and shuts off the gas
supply to the burner.

SPECIFICATIONS

Temperature Ratings:
Hot Junction area: 1400°F (760°C).
Cold Junction Area: 780°F (416°C).
Lead Lengths:
18 in. (0.5 m) to 48 in. (1.2 m) are available.
INSTALLATION
When Installing This Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced technician.
4. After installation is complete, check out product
operation as provided in these instructions.
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Thermocouple
INSTALLATION INSTRUCTIONS
WARNING
Fire or Explosion Hazard.
Can cause property damage, serious
injury or death.
Make sure the gas supply to the burner is turned
off before removing or installing the
thermocouple.
Replacement Installation
1. Disconnect and remove the old thermocouple.
2. Determine the type of thermocouple mount:
a. Screw-in type.
b. Clamp type.
c. Push-in type.
3. Follow the applicable installation instructions in
Fig. 1.
SCREW-IN TYPE CLAMP TYPE
Insert
thermocouple
in pilot
burner
thermocouple
in pilot burner
with shoulder
Tighten nut
above clamp,
M629
Fig. 1. Q340 Thermocouple installation.
Q340A
PUSH-IN TYPE
Remove
adapter,
Slip nut
insert
off adapter
thermocouple
and clamp
in pilot
burner
as shown
95- 6794- 1