68
LP-542 REV. 6.2.16
Condensate is slightly acidic (typically with a pH of 3 to 5) and must be piped with the correct materials. Never pipe the condensate
using steel, copper, brass or other materials that will be subject to corrosion. Plastic PVC or CPVC pipe are the only approved
materials.
A condensate neutralizer, if required by local authorities, may be purchased from HTP (7450P-212).
2.
It is very important that the minimum ¾” condensate line is sloped
downward away from the boiler to a suitable inside drain. If the
condensate outlet on the boiler is lower than the drain, you must use
a condensate removal pump, available from HTP (554200). This
pump is equipped with two leads that can be connected to an alarm
or another type of warning device to alert the user of a condensate
overflow, which, if not corrected, could cause property damage.
3. If a long horizontal run is used, it may be necessary to create a
vent in the horizontal run to prevent a vacuum lock in the condensate
line.
4. Do not expose the condensate to freezing temperatures.
5. It is very important you support the condensate line to assure
proper drainage.
H. FINAL CHECKS BEFORE STARTING BOILER
1. Verify the boiler and system are full of water and all system
components are correctly set for operation.
2. Fill the condensate trap with water.
3. Verify electrical connections are correct and securely attached.
4. Inspect exhaust vent and intake piping for signs of deterioration
from corrosion, physical damage, or sagging. Verify exhaust vent and
intake piping are intact and correctly installed per Venting Section (this manual) and local codes.
I. ADJUSTING GAS PRESSURE AT THE BOILER
NOTE:
Refer to Figure 55 when adjusting gas pressure. Loosen the
screw before checking the gas inlet pressure.
1. The boiler and its individual shutoff valve must be disconnected from
the gas supply piping system during any pressure testing of the system
at test pressures greater than ½ psi (3.5 kPa).
2. The boiler must be isolated from the gas supply piping system by
closing its individual manual shutoff valve during any pressure testing of
the gas supply piping system at test pressures equal to or less than ½
psi (3.5 kPa).
NOTICE
Do not fire (operate) the boiler until all connections have been
completed and the heat exchanger is filled with water. Doing so will
damage the boiler and void the warranty.
ADJUSTING GAS PRESSURE AT THE BOILER
1. Open the gas line and water valves.
2. Use a Phillips Head screwdriver to remove the boiler front cover. Remove the front cover.
3. Loosen the gas inlet pressure tap screw three turns a screwdriver. Connect the manometer to the inlet gas pressure port. See Figure
55.
Figure 56
–Gas Valve Detail
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