Trinity Lx
│
Installation and Operation Instructions
Lx – WH Series
48
Water Heater Circulator
- The Lx water heater is equipped with three 120VAC pump outputs (Pump A, B and
C). Use only Pump Output B for the Water Heater Circulator. Note that bronze or stainless steel circulators
are required for potable water systems. Ensure that circulators (pumps) are oriented as per the pump
manufacturers’ instructions. See Section 12.0 for wiring details.
Circulators responsible for forcing the water flow rate through the water heater must be
sized according to Table 10-5, see Figure 10-2 for details.
Failure to ensure the minimum water flow rate through the water heater when the burner
is on will not only reduce the operating efficiency of the water heater, but may also cause
premature failure, overheating and void the warranty. Failure to follow instructions may
result in fire, property damage, serious injury or death.
Table 10-5 Minimum Water Heater Circulator and Pipe Sizes
Model
Restriction
Head Loss
Min.
Pipe
Size
Min.
Flow
(GPM)
Max.
Temp
.
Rise
Maximum
Current Load
Minimum Pump Size
1
B&G
Grundfos
Armstrong
Taco
200
16’ at 16 GPM 1-1/4”
16
23
F
5 A or 2/5 hp
PL-36B
UP 26-99 BF
E8B
0013-MSSF
300
16’ at 24 GPM 1-1/2”
24
23
F
5 A or 2/5 hp
PL-36B
UPS 26-150 E14B
/
E9B
3
2400-30S
3
400
20’ at 32 GPM
2”
32
23
F
5 A or 2/5 hp
PL-55B
UPS 26-150
E24B
2400-45S
500
25’ at 40 GPM
2”
40
23
F
See Note
2
PDB-37
TP 32-160
E-22B
5
1935B
600
23’ at 48 GPM 2-1/2”
48
23
F
See Note
2
PDB-37
TP 32-160
E-22B
5
1935B
700
19’ at 56 GPM 2-1/2”
56
23
F
See Note
2
PDB-37
TP 32-160
E-33B
6
1935B
800
25’ at 64 GPM 2-1/2”
64
23
F
See Note
2
PDB-38
TP
40-160
-
1935B
Notes:
1
Pump models listed are for bronze or stainless steel circulators only; cast iron pumps are not permitted.
2
Maximum Current Load 1-1/2hp @ 120VAC or 3hp @ 240VAC.
3
Armstrong pumps E10B-E13B, and Taco pump 2400-40S are not recommended.
4
Armstrong pump E15B-17B not recommended.
5
Armstrong pump E23B-E33B not recommended.
6
Armstrong pumps E22B and E24B also recommended.
System Backflow Preventer -
Check if a backflow preventer is required by local codes. This manufacturer and
most plumbing codes require a thermal expansion control device be installed if a backflow preventer,
pressure reducing valve or check valve is installed on a domestic supply line. Installing an
expansion tank
approved for use with potable water is mandatory in applications using a System Backflow Preventer device
.
DHW/Potable Water Expansion Tank
- Check if an expansion tank is required by local codes. If required, the
expansion tank must be suitable for use with potable water and be sized in accordance with the water volume
of the system as well as the firing rate of the appliance. The expansion tank must be installed downstream of
any backflow prevention device used to control system thermal expansion. See example in Figure 10-2.
Ensure the expansion tank cannot become isolated from the water heater anytime the
system is operating. Failure to follow these instructions may result in discharge of the
Pressure Relief Valve may result in property damage or personal injury.
DHW Storage Tank -
Storage vessels shall be equipped with a drain valve to facilitate emptying the tank for
cleaning or flushing debris or foreign deposits. Drain valves on counter type water heaters shall be accessible
from the front of the heater.
In Canada, glass-lined storage tanks for household hot water service must
comply with the current performance requirements in CAN/CSA C309.
The DHW storage tank should be located in an area where leakage or connections will
not result in damage to the area adjacent to the appliance or to lower floors of the
structure. When such locations cannot be avoided, it is recommended that a suitable drain
pan, adequately drained, be installed under the appliance. This manufacturer is not
responsible for any water damage that may occur in connection with the storage tank or
any of its components.
