Thermal Solutions AMP 1000, Installation, Operation And Maintenance Manual

Page: 53 / 88

53
G. Pump Selection
A Circulation pump is a required component for complete installation of this appliance. Choosing the appropriate
pump is critical for the functionality, safe operation, and longevity of the appliance. Pumps should be sized for
each particular installation based on the required flow rate, water hardness, and total pressure drop in the primary
loop between the tank and the boiler.
1. Sizing a sufficient pump will ensure the desired temperature rise and meet the minimum flow rate requirements.
Lower flow rates will allow build up of scale and cause more stress on the heat exchanger.
a. If the flow rate is too high and the temperature rise is too low, the flow rate can be decreased by adding a
restriction in the loop.
i. Install a ball valve or globe valve (recommended) in the outlet side of the primary piping.
ii. With the boiler at its maximum input rate (high fire), slowly adjust the globe valve until the temperature
rise is within the recommended range shown in Table 28.
iii. Water velocities too high may cause erosion within the tubes of the heat exchanger or the primary piping.
Failure to adjust the flow rate to the specified values or use the appropriate pipe size can cause non-
warrantable damage.
2. The wetted materials of the pump must be suitable for potable water. Look for bronze or stainless steel pump
housings.
AMPW
Model
Nominal
Pipe Size
(in)
Water
Hardness
(gpg)
Flow Rate
(GPM)
Heat Ex. loss
(ft of head)
Total Loss
(ft of head)
Optional
Grundfos*
Pump (TS #)
Temperature
Rise ( 0 F)
1000
3 4-12 99 11 17 109695-02 20
4 12-15 132 18 21 109695-04 15
1250
3 4-12 99 11 17 109695-02 24
4 12-15 132 18 21 109695-04 18
1500
3 4-12 110 10 17 109695-02 26
4 12-15 147 16 20 109695-04 20
2000
3 4-12 138 12 23 109695-04 28
4 12-15 183 18 23 109695-05 21
2500
4 4-12 214 13 20 109695-05 23
6 12-15 285 21 23 110025-01 17
3000
4 4-12 214 13 20 109695-05 27
6 12-15 285 21 23 110025-01 20
3500
4 4-12 280 11 24 110025-01 24
6 12-15 372 18 22 110025-01 18
4000
4 4-12 280 11 24 110025-01 28
6 12-15 372 18 22 110025-01 21
NOTE: The total loss includes 50 ft of pipe, 8 elbows, and 4 Valves.
*Grundfos MAGNA1 pumps
Table 29: Pumps, Pipe Size, and Total Head Loss
NOTICE NOTICE
It is the installer's or system designer's responsibility to account for differences
in the circulation loop. Length, pipe diameter, elbows, and valves all contribute
to the total pressure drop in the loop.
XI . Hot Water Supply Boiler Piping
(continued)