Thermo Products MHA1-125N, MDA1-50N, MHA1-75N, MHA1-100N Typical Piping For Two-StageRegulation

All installations and services must be performed by qualified service personnel.

Figure 7: Typical Piping For Two-Stage Regulation

NOTICE: Two-stage regulation must be installed for propane gas when used with any Thermo Pride propane furnace. See illustration above of a typical two stage piping system.

Table 5: COPPER TUBING SIZE FOR PROPANE GASES

All black pipe sizes shown are nominal iron pipe sizes.

Seamless copper tubing may only be used with gases that are not corrosive to it. See note below and check with your LP gas supplier before using. Seamless copper tubing must comply with standard type K or L for seamless copper water tube, ASTM B 88; or seamless copper tube for air conditioning field service, ASTM B 280. Copper tubing sizes for indicated BTU input rates are given above in Table 5.

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