Install Instructions

Making the electrical connections | 45
6 720 806 992 (2013/09)Greenstar
Ø 3" / Ø 5" (Ø 80/125 mm) Concentric venting system
The maximum concentric pipe length ( tab. 23) depends on the
installation situation, the appliance type and the number of elbows used.
Example:
• Model: ZBR28-3A
• 90 ° elbows used: 2
• 45 ° elbows used: 2
Maximum straight vent pipe allowed: 38ft (11.6 m)
6.9 Testing gas and water connections for leaks
Water connections
▶ Open the heating supply and return valves and fill the heating system.
▶ Check all connections for leakage (test pressure: Max. 30 psi (2.07
bar) on the pressure gauge).
Gas line
▶ Close the gas shutoff valve to protect the gas valve from damage.
▶ Check all connections for leakage (test pressure: Max. 60" W.C. (150 mbar)).
▶ Release pressure.
7 Making the electrical connections
7.1 General notes
Electrical components must be installed by a trained and certified
electrician and the installation must meet the National Electric Code as
well as all applicable local codes and regulations.
The boiler must be properly electrically grounded in accordance with the
requirements of the authority having jurisdiction or, in the absence of
such requirements with the National Electrical Code, ANSI/NFPA 70
and/or the Canadian Electrical Code Part I, CSA C221.1, Electrical
Code.
All appliance modulation, control and safety components are tested and
pre-wired for use.
Observe safety precautions and all rules and regulations required by
local code and the National Electric Code.
Fuses
The appliance is protected with a fuse. It is located on the circuit board
( Fig. 8, page 16).
Controls and modules
For installation and electrical connection of controls and modules, see
the installation instructions of the accessory.
Installations  Fig. 40
Ø 3" / Ø 5"
(Ø 80/125 mm)
CONCENTRIC
PIPE
Maximum straight vent pipe length allowed for
Ø 3" / Ø 5" (Ø 80/125 mm) concentric pipe
Number of 90 °
elbows used
ZBR16-3A
ZBR21-3A
ZBR28-3A
ZWB28-3A
ZBR35-3A
ZWB35-3A
ZBR42-3A
ZWB42-3A
1 50 ft (15.2 m) 44 ft (13.4 m)
2 44 ft (13.4 m) 38 ft (11.6 m)
3 38 ft (11.6 m) 32 ft (9.8 m)
4 32 ft (9.8 m) 26 ft (7.9 m)
5 26 ft (7.9 m) 20 ft (6.1 m)
6 20 ft (6.1 m) 14 ft (4.3 m)
Table 23 Pipe lengths with Ø 3" / Ø 5" (Ø 80/125 mm) diameter and
termination
Fitting Equivalent
ft m
45 ° elbow 3 0.91
90 ° elbow 6 1.82
Table 24 Concentric pipe friction loss equivalent for fittings
NOTICE: System damage!
Pressure, control and safety equipment may be
damaged by excessive pressure.
▶ When you carry out a leakage test, make sure that no
pressure, control or safety equipment is installed that
cannot be isolated from the test pressure.
▶ The boiler and its dedicated shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 14" W.C. (35 mbar).
DANGER: Risk of electric shock!
▶ Before working on the power supply (120 VAC),
disconnect the boiler from the grid by shutting off the
emergency shutoff switch or disengaging the heating
system circuit breaker. Take measures to prevent
accidental reconnection.
▶ It is not sufficient to simply shut off the controls.
▶ Observe all applicable electrical codes and
regulations.
Provide a dedicated circuit breaker for the boiler and
heating system rated at least 15A. All line voltage wiring
must use at least AWG14 size cables.
Replacement fuses can be found on the back of the cover
( Fig. 42).