Lochinvar CF-CH(E)-i&s-08, 399 Radiant Floor and Snow Melt Heating Systems, 10ºF 20ºF 30ºF 40ºF

Installation and

Service Manual

Radiant Floor and Snow Melt

Heating Systems

This type of heating boiler application operates in a low temperature range which requires a boiler bypass as described under Low Temperature Return Water Systems. A non-metallic rubber or plastic tubing installed in a radiant (in floor) system must have an oxygen barrier to prevent oxygen from entering the system through the walls of the installed tubing. Excessive oxygen absorption into the system will result in an accelerated rate of corrosion causing a sludge buildup. This excessive corrosion will also damage the boiler and system components. Sludge formed as the result of excessive oxygen in the system can restrict water flow resulting in a premature boiler failure. Any boiler damage due to excessive oxygenation is non- warrantable.

TABLE-P

System Temperature Rise Chart Based on Btu/hr Input

			ΔT			ΔT		ΔT		ΔT
		10ºF				20ºF		30ºF	40ºF
Input	Output	GPM FT. HD			GPM	FT.HD	GPM FT.HD		GPM	FT.HD
399,999	339,999	68	7.4		34	2.4	23	1.1	17	0.6
500,000	425,000	--	--		42	4.1	28	1.6	21	0.7
650,000	617,500	--	--		55	5.2	37	3.0	28	1.6
750,000	712,500	--	--		63*	7.2	42	4.1	32	2.3
990,000	841,500	--	--		83	5.4	55	2.6	42	1.5
1,260,000	1,071,000	--	--		107*	13	71	4.4	53	2.7
1,440,000	1,224,000	--	--		--	--	81	6.3	61	3.8
1,800,000	1,530,000	--	--		--	--	102*	11.8	76	6.6
2,070,000	1,759,500	--	--	-	--	--	--	--	87	9.0

*Requires Cupro-Nickel heat exchanger.

* CAUTION: The maximum flow rate for models 399,999 - 750,000 Btu/hr is 55 GPM and 90 GPM on models 990,000 - 2,070,000 Btu/hr. Do not exceed the maximum flow rate of the heating boiler.

If higher flow rates are required through the boiler, an optional Cupro-Nickel heat exchanger is available. When using a Cupro-Nickel heat exchanger, GPM can be increased by 30 percent. Consult the factory for specific application requirements.

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