420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21
23
Connect the 3/4” DHW inlet and outlet pipes. A shut-off valve between the city water supply and DHW inlet is recommended for ease of
service. HTP offers threaded 3/4” DHW tankless isolation valves with a DHW pressure relief valve for ease of installation and future service.
Connect the 1” CH return and supply pipes. Isolation valves are recommended for ease of service.
A. CH Supply 1”
B. DHW Outlet 3/4"
C. Gas Inlet 3/4"
D. DHW Inlet 3/4"
E. CH Return 1”
I.
Condensate Discharge
L. Drain Valve
A. CH Supply 1”
B. Return from Indirect Water Heater 3/4"
C. Gas Inlet 3/4"
D. Not Used
E. CH Return 1”
I.
Condensate Discharge
L. Drain Valve
ELU120WCN - ELU150WCN
ELU85WBN - ELU120WBN
Figure 14 - Water / Gas Connections
I
L
A
B
E
C
20
0
250
100 150
50
200
20
0
80
60
40
psi
I
L
A B
D E
C
20
0
250
100 150
50
200
20
0
80
60
40
psi
I
L
A
E
C
20
0
250
100 150
50
200
20
0
80
60
40
psi
I
L
A
B
D E
C
20
0
250
100 150
50
200
20
0
80
60
40
psi
ELU-150WCN
ELU-85WBN or ELU-120WBN with storage
ELU-85WBN or ELU-120WBN only Heating
ELU-120WCN
