INSTALLATION AND OPERATION INSTRUCTIONS
3-6
SFT 199 TANKLESS WATER HEATER
INSTALLATION AND OPERATION INSTRUCTIONS
3-6
SFT 199 TANKLESS WATER HEATER
CAUTION: When removing the heat exchanger cover in step 6, be careful
not to damage the burner and refractory material located on the opposite side
of the heat exchanger cover. Use caution when handling refractory materials.
See Caution on page 4-2.
6. Remove all 6mm hex bolts and lock washers from the heat exchanger cover
and carefully remove the front cover complete with the fan and the gas valve
attached. Carefully inspect the gasket sealing the heat exchanger to the
heat exchanger cover for damage, hardness, cracks, and/or discoloration. If
damaged in any way, you must replace the gasket.
7. Place the heat exchanger cover in a safe location.
REASSEMBLY
1.
Replace the heat exchanger gasket. Inspect, and when needed change
other gaskets. If necessary, inspect and clean the gasket mating surface.
2. Place the heat exchanger cover onto the heat exchanger and loosely install
the 6mm hex bolts and lock washers removed in step 6. Tighten the 6mm
hex bolts in a cross pattern as shown in the Figure 31.
3. Connect the gas line to the gas valve ensuring the O-ring is in place. Tighten
the gas valve nut. Ensure the upper gas valve connection is tight. Re-connect
the gas valve electrical connection.
4. Re-connect the electrical connection to the fan.
5. Inspect the condensate trap for debris. Remove and clean if necessary. Fill
the condensate trap with water.
6. Turn on the gas supply valve to the unit and inspect for gas leaks. Use an
approved leak detection solution. Soap test all joints.
7. Ensure the unit is full of water and purged of air if the unit was drained during
disassembly.
8. Turn on the power to the unit and create a call for domestic hot water.
9. Inspect the gasket around the unit cover.
10. Check ue gases for proper combustion. See Section 3.3 Commissioning for
proper adjustments.
11. Re-install the unit’s cover and set the unit into normal operation.
Figure 31: Tighten hex bolts in
cross pattern direction.
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