Install Instructions

Installation | 33
6 720 806 992 (2013/09)Greenstar
The following anti-freeze fluids and concentrations have been approved:
Corrosion inhibitors
The following anti-corrosion agents are approved:
▶ System fluid pH must be maintained between 7 and 8.5 to prevent
system damage.
▶ Use only untreated water to fill the system.
▶ Do not use TSP (tri-sodium phosphate).
▶ Do not use fill water treated with salt bedding type exchangers (ion
exchanger).
▶ Never introduce non-approved boiler treatment or similar additives.
▶ Only use fill water with a hardness below 7 grains.
▶ Filling with chlorinated water is acceptable if chlorine levels are below
100 ppm.
▶ Do not use inhibitors or other additives unless listed in this document.
▶ Consult a local water treatment specialist for recommendations if any
of the above is outside the stated ranges.
▶ When using oxygen permeable PEX, the system must be separated
from the boiler by a heat exchanger.
▶ A correctly sized and working expansion vessel must be installed.
▶ Do not exceed the maximum permissible fl ow rate through the boiler.
Excessive flow can cause erosion damage to the heat exchanger.
▶ Eliminate System Leaks
Continuous addition of make-up water will constantly add oxygen to
the system and lead to corrosion. All system leaks must be repaired.
Boiler sealer
This boiler is not approved for use with boiler sealer.
LPG
To protect the appliance against high pressure (ANSI/Z223.1/NFPA54
(National fuel gas code) or CAN/CSA B 149.1 (Natural Gas and Propane
installation code)):
▶ Install a pressure regulator with a safety valve.
6.1.2 Other important information
• The installation of this boiler must comply with all national and local
code and regulations.
• Only operate this boiler with the combined air/flue system specifically
designed and approved for it.
• Only use approved venting systems per the manufacturer's
instructions.
• Do not dispose of untreated boiler condensate in septic systems.
• Inspect the sewer pipes for suitability before disposing of untreated
boiler condensate into them.
• Verify with the local authority that disposing of untreated boiler
condensate into public sewer systems is permitted.
6.2 Comparing the size of the integrated expansion
vessel
The following diagrams allow verifying that the integrated expansion
vessel has sufficient capacity for the intended application, or if an
additional expansion vessel is needed (not for radiant floor heating).
The following standard conditions were used:
• Precharge volume 20% of the rated volume in the expansion vessel
• Differential to the safety valve of 7.25 psi (0.5 bar)
• Precharge pressure of the expansion vessel equal to the static system
height above the boiler
• Maximum operating pressure: 30 psi (2.07 bar)
Fig. 13 Operating capacity of the expansion vessel in °F and gallons
Fig. 14 Operating capacity of the expansion vessel in °C and liters
Key to Fig. 13 and Fig. 14:
[I] Precharge pressure 7.25 psi (0.5 bar) (default setting)
[II] Precharge pressure 10.9 psi (0.75 bar)
[III] Precharge pressure 14.5 psi (1.0 bar)
t
V
Supply temperature in °F ( °C)
V
A
System capacity in gallons (liters)
A Within operating capacity of the expansion vessel (left of the
relevant curve)
B Additional expansion vessel required (right of the relevant curve)
▶ If results are borderline: Determine precise vessel sizes.
▶ If the results are to the right of the curve: Install additional expansion
vessel.
Chemical Name Concentration
Nalco (Varidos) FSK 22 - 55 %
Fernox Alphi 11 Observe manufacturer's instructions
Intercool NFP-50 AA 0 - 39 %
Antifrogen N Observe manufacturer's instructions
NoBurst AL 0 - 55 %
Table 14 Anti-freeze
Chemical Name Concentration
Fernox F1 Observe manufacturer's instructions
Nalco 77381 1 - 2 %
Sentinel X 100 1.1 %
Table 15 Corrosion inhibitors
200
80
100
120
140
160
180
0 20 40 80 100
120
60
t
V
/°F
V
A
/gal
6720641933-13.1O
A
B
I
III
II
90
30
40
50
60
70
80
0 75 150 300 375
450
225
t
V
/°C
V
A
/l
6720641933-27.1O
A
B
I
III
II