MrCool MHWH199NC U Series, Руководство по установке

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17
.
Corrugated Connector
Tighten the water heater connection valves with
care to avoid damaging them.
• The connection fitting on all water heaters is
3/4 in (19.1 mm).
• 1/2 in (12.7 mm) rigid pipe can be used. Refer
to the gas pipe sizing tables in Chapter 8 for
limitations.
DO NOT
use 1/2 in (12.7 mm) corrugated
tubing or connectors as these could
cause excessive noise to occur.
• When using flexible gas lines, ensure that the
inner diameter of the pipe and connector are
sufficient to supply the required amount of
BTUs. Also, ensure the flexible line has no
crimps or tight bends in it, as these will
restrict gas flow.
• When using rigid pipe, the manufacturer
recommends the installation of a union on
the gas supply line close to the water heater.
This will facilitate any future maintenance or
service required.
• Check with the local jurisdiction to verify
the use of 1/2 in (12.7 mm) gas pipe is
allowed/approved in the area where the
water heater is being installed
mrcool.com
Connecting the Gas Supply
Fig 7.1
Fig 7.2
17
The water heater
is recommended
to be the first
appliance
connected to the
gas supply line.
Gas Supply
NOTE: The gas
meter’s capacity
should be ≥ the
total gas capacity
of all connected
appliances.
To other gas appliances
Gas Supply Line
Gas Supply
Gas Supply Line
To other gas appliances
Pipe Size:
1/2 inch to 3/4
inch (inner
diameter)
Gas Shut-Off
Valve
Union
Gas Inlet
Prior to using an Excess Flow Valve (EFV) in
the gas line, check the manufacturer’s
minimum and maximum flow capacity
rating. An improperly sized EFV will not
allow for full gas flow to the water heater.
If this occurs, it could cause improper
operation of the water heater.