APC UTS6H Specifications download pdf (Page 33)

11.1 Check Gas Supply

Gas pipe to boiler must be correct size for length of run •

and for total BTU per hour input of all gas utilization

equipment connected to piping. See Tables in boiler

and HONDA MCHP installation manuals for proper

size. Verify gas line complies with authority having

jurisdiction.

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• Boiler and MCHP units’ individual

shutoff valves must be disconnected from gas supply

piping system during any pressure testing of system at

test pressures in excess of ½ psig (3.5 kPa).

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• Boiler and MCHP unit system must

be isolated from gas supply piping system by closing

respective individual manual shutoff valves during any

pressure testing of gas supply piping system at test

pressures less than or equal to ½ psig (3.5 kPa).

Recommend line pressure be within minimum and •

maximum values in Table 11-1 for proper operation of

system.

Table 11-1 Gas Supply Pressures

Gas tyoe

Minimum

(in. w.c.)

Nominal

(in. w.c.)

Maximum

(in. w.c.)

Natural 4” 7” 10”

Propane 10” 12” 14”

Consult boiler and HONDA MCHP installation procedures for

leak testing and purging gas lines.

11.2 Gas Piping

Consult boiler and HONDA MCHP installation procedures for

speciﬁ c instructions regarding gas piping.

11 - GAS SUPPLY PIPING

CAUTION

Units cannot operate properly or safely using fuels

outside normal commercial standards. Connect

boiler and HONDA MCHP units only to gas supplied

by commercial utility or supplier. Private gas

wells do not generally provide gas with consistent,

uniform and predictable heating values and

densities. Many non-commercial wells contain

impurities such as sulphur, which may damage

furnace or HONDA MCHP.

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APC UTS6H Specifications Page 33

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