Munchkin Gas-Fired Hot Water Boiler manual Circulator Sizing Chart

GAS-FIRED BOILER Boiler Manual

PART 5: BOILER PIPING (CONTINUED)

10.The Safety Relief Valve is installed at the factory. Pipe the discharge of the safety relief valve to prevent injury in the event of pressure relief. Pipe the discharge 6” above the drain to a drain. Provide piping that is the same size as the safety relief valve outlet. Never block the outlet of safety relief valve.

H. CIRCULATOR SIZING

The Munchkin Boiler Heat Exchanger does have pressure drop which must be considered in your system design. Refer to the graph in Fig. 5- 1 below for pressure drop through the Munchkin Boiler Heat Exchanger for recom- mended pump selection at a 20∆t design.

Figure 5-1

	32
	30
	28
	26
Head	24
	22
	20
of
	18
in Feet
	16
	14
Friction	12
	10
	8
	6
	4
	2
	0
	5	10	15	20	25	30	35	37.5	40
				Flow in Gallons per Minute

MUNCHKIN 399M

*NOTE: The recommended circulators are based on 1 gpm per 10,000 btu/hr with 20°∆t.

Figure 5-2

CIRCULATOR SIZING CHART

for Central Heating Circulator (P1)* and SuperStor Ultra Circulator (P2)*

		Taco
	P1		P2
T50/T80/80M	007		009
140M	0010		0011
199M	0011		0013
399M	1400-50		1400-50

Grundfos

P1	P2
UPS15-58F SPD-2	UPS15-58F SPD-3
26-64F	26-96F
26-96F	26-96F
UPS 32-160	UPS 32-160

Bell & Gossett

P1	P2
NRF-22	NRF-22
NRF-33	NRF-36
NRF-36	NRF-36
PL-55	PL-55

Note: SuperStor Ultra Indirect pump assumes the following: (6) 90 degree elbows and (1) tee on the run of 20' and 1" of copper tube size, but does not include any flow checks or zone valves.

*See drawings on the following pages

15