Finned copper tube gas boilers & water heaters – Boiler Manual
13
Figure 12
Futera III Piping
Shut off valves and unions should be installed at the
inlet and outlet connections of the boiler/hot water
heater to provide for isolation of the unit should
servicing be necessary.
Freeze Protection
Installations in areas where the danger of freezing exists are not
recommended unless proper freeze protection is provided. The
following precautions MUST be observed:
1. A continuous flow of water through the unit MUST be main-
tained! The pump responsible for flow through the boiler/water
heater must run continuously!
2. An ethylene glycol/water mixture suitable for the minimum
temperature that the unit will be exposed to must be used. The
pump must be capable of producing a minimum of 15% more
flow and overcoming a 20% increase in head loss. Domestic
water systems must be isolated from the water heater by the
use of a heat exchanger or other approved method.
3. If the unit must be shut off for any reason the electric, gas and
water supplies MUST be shut off and the unit and its pump
completely drained.
Improper outdoor installation of this unit can cause
boiler failure voiding the manufacturer’s warranty!
Valve
Pipe the discharge of the pressure relief valve as shown in Figure 12.
Never install any type of valve between the boiler/
water heater and the relief valve or an explosion causing
extensive property damage, severe personal injury or
death may occur!
Flow Switch
The flow switch supplied with the boiler/water heater must be wired to
the terminal strip in the control panel to prevent the boiler from firing
unless there’s adequate water flow through the unit. The flow switch must
be installed in the supply piping adjacent to the boiler outlet connection.
Failure to properly install the flow switch may result
in damage to the boiler/water heater heat exchanger
voiding the warranty!
HEATING SYSTEM PIPING
General Piping Requirements
All heating system piping must be installed by a qualified technician in
accordance with the latest revision of the ANSI/ASME Boiler and
Pressure Vessel Code, Section IV, and ANSI/ASME CSD-1, Standard
for Controls and Safety Devices for Automatically Fired Boilers. All
applicable local codes and ordinances must also be followed. A minimum
clearance of
1 in
,
25 mm
must be maintained between heating system
pipes and all combustible construction. All heating system piping must
be supported by suitable hangers not the boiler. The thermal expansion
of the system must be considered when supporting the system. A
minimum system pressure of
12 psig
,
82.7 kPa
must be maintained.
Heating Boiler Piping Connections
The supply and return connections should be sized to suit the system,
see Table 7.
Table 7 Supply & Return Pipe Sizing (Flanged)
Model Size
Supply Size
Return Size
500 thru 1000
2”
2”
1250 thru 2000
2 1/2”
2 1/2”
