Navien Gas Water Heater Installation
41
3.Case III NR, NP + NR-A, NP-A Model Recirculation
It is necessary to install the check valve in
“C”.
Install check valve in either
“A” or “C”
.
4. Case IV. CH + NR-A, NP-A Model Recirculation
Install check valve in the
“A” series cold water inlet for cascade system.
When linking with CH series connnect the solenoid valve wire to the external
power wire of CH series.
Hot
Cold
Gas
Hot
Cold
Gas
DHW Supply
Communication Cable
"B"
"B"
Cold Water Supply
Gas Supply
Hot
Cold
Rec
Gas
Remote Controller
(NR-10DU)
Hot
Cold
Rec
Gas
Master Unit
Slave n-1
Slave n-14
Slave n-15
"C"
"C"
"A"
Recirculation
SYMBOL
Ball Valve
Check Valve
Pressure Relief Valve
Expansion Tank
Union
Faucet
WATER
PRESSURE
psi
Primary Loop
S
Hot
Cold
Rec
Gas
(NR-10PU)
Hot
Cold
Rec
Gas
GAS SUPPLY
COLD WATER SUPPLY
RECIRCULATION
Communication
Cable
DHW SUPPLY
Secondary Loop
Master
(CH Model)
Slave n-1
NR/NP-(A)
Slave n-15
NR/NP-(A)
Space Heating
Hot Cold Gas
H.S
H.R
SYMBOL
S
BALL VALVE
CHECK VALVE
Pressure Relief Valve
Expansion Tank
Union
Faucet
Solenoid Valve
Circulation Pump
Air Seperator
