HTP Mod Con 300 HL User Manual

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5. The boiler shall be installed so the gas ignition system components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and service (circulator replacement, condensate trap,
control replacement, etc.)
A. OPERATING INSTRUCTIONS
Remove boiler cover. If you smell gas, STOP. Follow listed safety instructions. If you do not smell gas,
follow the next steps.
1. Turn on all electrical power to the boiler.
2. If desired, adjust the temperature set point of the boiler. The factory default setting is 180
o
F. If changes
are necessary, follow “Adjusting the Set Point” in this section.
3. On the initial start-up of this boiler, you may note a lock-out code of F01. This is a low gas pressure
switch lock-out from the factory-installed low inlet gas pressure switch (located on the left in the 500 and
on the right in the 850). You will also see a yellow LED illuminated under the cover of the inlet gas
pressure switch. Once the gas is turned on, reset the gas pressure switch by FIRMLY pressing on top of
the plastic cover over the red reset button. You will note that the yellow LED has gone out. Press and
hold the {S4} key on the control panel for 4 seconds to begin normal operation.
4. Set the thermostat to the desired setting.
5. If the appliance fails to start, refer to Troubleshooting, Part 11.
B. ADJUSTING THE SET POINT
NOTE: Before you can change the temperature from the factory setting of 180
o
F, make sure none of the
thermostats are calling for heat. The controller will not memorize a program setting while in a heating
cycle.
To adjust the temperature of the boiler:
• Press the {S3/Program} key for three seconds until you see a flashing “C” alternating to “180”
(this number is the factory set point of 180
o
F).
To change the temperature set point:
• Press the {S1/-} key to decrease temperature (temperature can go as low as 50
o
F).
• Press {S2/+} to increase temperature (temperature can go as high as 200
o
F).
To access additional setting options:
• Press {S3} to advance to each parameter listed in the chart below.
Function
Display
Press {S3} once
Boiler Temperature Set Point
C
Press {S3} twice
Boiler Differential Set Point
Ch
Press {S3} three times
Indirect Temperature Set
Point
D
Press {S3} four times
Indirect Differential Set Point
DH
Press {S3} five times
Temperature Measurement
Units
f
Table 14 – Additional Setting Options
To decrease or increase values, press {S1} to decrease and {S2} to increase. Changes are directly
stored and the display returns to normal mode after one minute.

HTP Mod Con 300 HL Specifications

General

Brand	HTP
Model	Mod Con 300 HL
Category	Boiler
Language	English