Convotherm OGB-10.10 Installation And Maintenance Instructions Manual page 18

2) Water Supply System Pressure Requirements
The water supply must provide:
•
A minimum dynamic pressure of 35 psi (2.4 kg/cm
•
A maximum static pressure of 60 psi (4.1 kg/cm
a. Install Water Supply Lines
The Installer/Owner is responsible for the correct water connection of the Combi. When
connecting water supply lines observe the following instructions, and any and all other
applicable national, state, and local codes and regulations:
1) Connect the Combi to COLD WATER
2) Never connect the Combi to HOT WATER! The Condenser system and the steam
generator will not work properly if connected to HOT or WARM water.
3) The water supply must have a minimum dynamic (flow) pressure of 35 psi (2.4
kg/cm²) and a maximum static pressure of 60-psi (4.1 kg/cm²).
4) If the static pressure is above 60 psi, a pressure regulator must be used and set at
approximately 50 psi. Pressure above 60 psi can damage solenoid valves.
5) Combis are supplied with two connection points for incoming water: condenser,
and generator or spritzer.
6) If water supply meets requirements shown in Table 2-3 then the Single Water
Supply Arrangement shown in Figure 2-10 may be used.
a) If the Single Water Supply arrangement is used: Supply piping to the Water
Distributor (cold water supply splitter) (Order Number SPW), or similar tee
fitting must be at least next largest size of pipe than the connection provided at
the Combi.
7) If water supply fails to meet the requirements shown in table 2-3 then use the
Separate Feed Water Supply Arrangement shown in figure 2-11.
8) Installation Requirements:
a) Apply non-hardening pipe sealant to all the threaded connections except the ¾"
GHT Female (Garden Hose Thread or National Hose Thread) connections at the
Water Connection. GHT or NHT connections do not require pipe sealant.
b) Install a manual water shut-off valve (not provided) between main cold water
supply line(s) and Combi supply lines.
c) The National Sanitation Foundation (NSF) requires installation of a
check-valve (or other approved anti-backflow / anti-siphon device) (not
provided) in all supply lines in accordance with and as required by local, state,
and national health, sanitation and plumbing codes.
d) Consult local codes to determine exactly what type of anti-backflow / anti-
siphon device is necessary to meet local requirements.
b. Testing Water Supply Lines
1) Check all connections for proper tightness.
2) Remove side panels to inspect water connections inside the Combi.
3) Open the water supply valves.
4) Check all lines and connections for leaks, both inside and outside the COMBI.
5) If Startup and Checkout will be performed next, leave side panel off; otherwise,
replace the side panel and secure it to the Combi.
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