Thermann TH28ENR6L, Installer Manual

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Thermann Installer's Manual
Gas Continuous Flow Water Heaters
G
(1 1/4"-2")
(3/4"-1 1/4")
Hot W
ater
Supply
Circulation Pump
1
Circulation Pump
2
(If Necessary)
Remote Controller
Pump Control Wires
(use external relays)
When installing 2 pumps in parallel
*
Set “Yes” for the question
“
Start pump rotation
?”
in system settings.
(See SC-401-6M Installation Manual)
Gas Pipe
Hot W
ater Return Line
*
Size the cold water supply piping to
allow for maximum flow rates of the units.
Hot W
ater
Supply Pipe
(1 1/4"-2")
Expansion Tank
Cold
Wa
ter Supply Pipe
Unit
6
Unit
2
Unit
1
System Controller
B-1. Example of Recirculation with a Multi-System (Recirculation system)
This system will make hot water more quickly available to remote fixtures.
The pump will circulate water through the loop until the entire loop is warm, and then the system
controller will turn off the pump until the loop cools down.
*
Size the pump to pr
ovide at least 8 L/min @ 3 m of head + piping losses thr
ough the system.
Check the maintenance monitors on the unit to make sur
e the pump is pr
oviding adequate flow
.
•
Make sur
e that the flow rate is not gr
eater than 1.2 m/sec.
If the flow is too low
, the r
ecir
culation loop temperatur
e will not be warm enough, if the flow is too
high, the lifetime of the unit will be r
educed.
*
If ther
e ar
e multiple cir
culation loops, try to make the flow rate .3-5 L/min in each loop.
*
Use copper or stainless water piping for the entir
e system.
Only TH50ECR6 series and TH32ECR6 series.
* The remote controller
terminal location may differ
depending on the unit.
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