Raypak 88AR-398A, Инструкция по установке и эксплуатации

Страница: 37 / 68

37
Direct Vent—Horizontal
Installation
These installations utilize the heater-mounted blower
to draw combustion air from outdoors and vent com-
bustion products to the outdoors.
The total length of air supply pipe cannot exceed the
distances listed in Table M. Each elbow used is equal
to 10 ft of straight pipe. This will allow installation in
any arrangement that does not exceed the lengths
shown in Table M.
The vent cap is not considered in the overall length of
the venting system.
Care must be taken during assembly that all joints are
sealed properly and are airtight.
The vent must be installed to prevent the potential ac-
cumulation of condensate in the vent pipes. It is
required that:
1. The vent must be installed with a condensate
drain as directed by the vent manufacturer.
2. The vent must be installed with a slight upward
slope of not more than 1/4 inch per foot of hori-
zontal run to the vent terminal.
Termination
The vent cap MUST be installed on the exterior of the
building. The vent cap cannot be installed in a well or
below grade. The vent cap must be installed at least 1
ft above ground level and above normal snow levels.
The vent cap MUST NOT be installed with any com-
bustion air inlet directly above a vent cap. This vertical
spacing would allow the flue products from the vent
cap to be pulled into the combustion air intake installed
above.
This type of installation can cause non-warrantable
problems with components and poor operation of the
boiler due to the recirculation of flue products. Multi-
ple vent caps installed in the same horizontal plane
must have a 4 ft clearance from the side of one vent
cap to the side of the adjacent vent cap(s).
Combustion air supplied from outdoors must be free of
particulate and chemical contaminants. To avoid a
blocked flue condition, keep the vent cap clear of
snow, ice, leaves, debris, etc.
Condensate Management
The condensate must be drained properly to protect
the appliance and drainage system. The condensate
from the boiler is acidic. Its pH is between 3.2 and 4.5.
Raypak recommends treating the condensate with a
Condensate Treatment kit (Z-12). The treatment kit is
connected to the drain system and contains limestone
(calcium carbonate) chips to raise the pH level of the
condensate. The kit may be added to avoid long-term
damage to the drainage system and to meet local
code requirements. The pH level of the effluent enter-
ing a sanitary drain must be 5.0 or higher.
Vent pipe condensate drains are also required for
installation of the XPak FT. Follow vent manufacturer
instructions for location of condensate drains in the
vent. The vent condensate should also be routed
through a treatment kit, as required by local code
requirements.
The treatment kit must be sized to the condensate
generated by the appliance and the vent.
The condensate drain line must not be allowed to
freeze. Take appropriate measures.
Expected max condensate volume:
88AR 0.9 GPH
108AR 1.1 GPH
198AR 2.0 GPH
278AR 2.8 GPH
398A 4.0 GPH
CAUTION: This venting system requires the
installation of a condensate drain in the vent piping
per the vent manufacturer’s instructions. Failure to
install a condensate drain in the venting system will
void all warranties on this boiler. Note that the
condensate is acidic and highly corrosive.