MrCool MHWH199NC U Series, Руководство по установке

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WARNING
The manufacturer recommends connecting the water heater as the first gas appliance to the meter to
ensure a sufficient gas supply. (See Fig. 7.1 & 7.2)
Before connecting the gas supply, determine the gas type and pressure for the water heater by
referring to the rating plate. Use the same gas type indicated on the rating plate. Using a
different gas type could result in abnormal combustion and water heater malfunction. Gas
supplies should be connected by a licensed professional only.
DO NOT
use flame to check for gas leakage. Perform a bubble test on the joints to check for
gas leaks. If a leak exists, bubbles will form at the leaking joint. A gas leak could result in
substantial property damage, severe personal injury, or death.
DO NOT
attempt a field conversion of this water heater from natural gas to propane or vice
versa. This water heater CANNOT be converted from one type to another. Doing so will result
in dangerous operating conditions and will void the warranty.
DO NOT
allow the piping to be supported by the water heater or its accessories. Properly
support the piping with hangers.
To avoid damaging the connectors on the water heater, use two wrenches when tightening
piping to the water heater. Use one wrench to prevent the connector at the water heater
from turning, and the other wrench to tighten the connection. Damaged connectors may
result in system leaks.
Ensure that the gas piping is protected from physical damage and freezing. Failure to follow
these instructions could result in gas leakage, which can result in fire, explosion, property
damage, severe personal injury, or death.
The appliance and its gas connection must be leak tested before placing the appliance in
operation.
The inlet gas pressure must be within the range specified in Chapter 2: Product
Specifications of this manual (Refer to Max. Inlet Gas Pressure & Min. Inlet Gas Pressure).
7
Connecting the Gas Supply
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Connecting the Gas Supply
To connect the gas supply:
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•
•
•
1. Determine the gas type and pressure for the water heater by referring to the rating plate.
2. Perform a pressure test on the main gas supply line.
3. Purge the gas line of any debris.
4. Determine the proper size and type of piping for the gas line. Refer to the diagrams and tables on the
following pages.
5. Install certified, full port valves on the gas supply line and water heater.
6. Connect the gas supply line.
7. Test the supply line, all connection points, and the water heater for gas leaks.