0503RHC8RJLGBEN
19/34
* Observe the burner gas pressure on the manometer and
compare to the required pressure (on/off system);
* If necessary, adjust the burner gas pressure. Remove the
cover screw (Honeywell application)
Turn the regulator screw anti-clockwise to decrease
pressure or clockwise to increase pressure;
* Set room thermostat to lowest setting to turn OFF the
burners. Replace the test point screw (if removed) and
with the main burner alight, test for gas soundness using
a soapy solution.
Reset temperature control/room thermostat to comfort
operating level.
Figure 10 : HONEYWELL gas valve
Legend :
c
gas valve HONEYWELL V4601AB
d
inlet pressure gas test point
e
burner pressure gas test point
f
burner pressure regulator cover
g
burner pressure regulator
h
electrical connection 230V
5.6 A
IR HEATER CONTROLS AND OPERATION
Check air heater operation after all adjustments have been
carried out. Set the temperature control above ambient
temperature.
RHC 8000(M) RJL air heaters are fitted with a pressure
sensitive, combustion air safety control that monitors
pressure differential of the combustion airflow. The control
operates with the settings given in table 4 (settings are for
sea level installations)
When the combustion air safety control closes verifying
airflow, the gas control valve will open and the burner will
light. If the burner does not light, the ignition controller will
lockout and must be manually reset. The air heater is fitted
with a signal lamp and manual reset button that indicates
lockout.
NOTE: If the first reset is not successful wait 15
seconds before resetting the igniter.
Table 4 : Combustion air pressure control
settings
Model Normal
equilibrium
warm (Pascal)
Set point 'off'
(Pascal)
8030 06
200 150
8045 09
190 150
8050 06
220 175
8060 12
175 135
8075 09
175 135
8075 15
160 130
8090 18
123 130
8100 12
130 100
8125M.15
310 250
8150M.18
250 200
8175M.21 (*)
140 (95)
110 (75)
8200M.24 (*)
200) 180
(*) :
for the models 8175M.21 & 8200M.24 a second differential
pressure switch is used during the first 100 seconds after
start of heat demand. These pressure controls have lower
setting (indicated between brackets in table 9).
Wait approximately 30 seconds after the burner has lit, the
time delay relay will activate the thermal fan control and will
also activate the fan if wired (most air handlers are
equipped with constant running fans). Continue to operate
the air heater for several minutes to ensure correct
operation.
Turn room thermostat to its lowest setting. The main
burners should extinguish while the fan continues to run to
cool the air heater. The fan delay relay will normally be de-
energized and stop the fan motor in approximately 45
seconds (if wired).
5.7 O
PTIONS
5.7.1 Two stage burner control
Description
This option provides a 2-stage burner control system
providing 100% & 50% heat input.
Appliances so equipped will only operate in a two stage
manner when connected to a two stage external control
(room thermostat) or duct stat.
Important
Safe operation of the burner is only assured when the low
rate setting is 50% or greater than the high rate setting.
The low rate gas setting pressure should therefore never be
less than 25% of the normal high rate setting pressure. See
table included in this document.
