Thermal Solutions EVCA SERIES, Installation, Operating And Service Instructions

Page: 40 / 100

40
7.
Electrical
a. Each boiler must be provided with a dedicated
fused disconnect.
b. Install wiring and ground boiler in accordance
with requirements of authority having
jurisdiction. In absence of such requirements,
reference the National Electrical Code, ANSI/
NFPA 70 and/or CSA C22.1 Electrical Code.
c. Refer to Figure 1 for electrical data for each size
boiler.
d. Refer to the Electrical Section for further
warnings, cautions, notices and instructions.
NOTICE
Do not install boiler and circulator pump on the
same fused disconnect.
8.
Condensate Piping
a. Each boiler requires separate condensate drains.
In addition, most venting configurations require
separate condensate drains in the vent system.
H.
CONDENSATE DRAINS
1. Each boiler has two condensate drains - one from
the primary heat exchanger, and one from the
secondary heat exchanger. In addition, most vent
configurations require a drain tee located in the vent
piping. Pipe each condensate drain separately to a
floor drain or condensate pump/sump. See Table 7
for maximum condensate flow rates.
2. Use continuous Teflon, high temperature resistant
silicone tubing, or other tubing material compatible
with flue gas condensate for condensate piping.
TABLE 7: MAXIMUM CONDENSATE
FLOW
Boiler
Model
Maximum
Condensate Flow (gal/hr)
EVCA-750 3.4
EVCA-1000 4.5
EVCA-1500 6.8
EVCA-2000 9.1
EVCA-3000 18.6
CAUTION
Failure to properly pipe condensate system will
greatly reduce boiler life. Do not install plugs,
caps or valves on condensate piping.
Do not manifold boiler condensate drains or vent
drains together.
Do not crimp condensate lines or reduce drain
line inner diameter size.
Each condensate drain must contain a siphon/
pigtail or trap to prevent flue gas flow through
the condensate piping. The height of the top of
the siphon/pigtail loop or trap shall not exceed
the height of the condensate drain outlet.
3. A common condensate pump/sump may be used.
Run separate piping from each condensate drain
to the sump. A common drain may be used to
discharge condensate from the sump. Consult
pump/sump manufacturer for compatibility of
pump/sump materials of construction. If a common
sump is used, individual drain lines should be
connected such that one drain cannot back feed into
another drain.
4. Consult local authorities regarding disposal of flue
gas condensate into public waste water system.
Some jurisdictions require that the condensate
be buffered before discharge. This buffering is
commonly achieved by draining the condensate
through a limestone bed. The condensate will be
slightly acidic and range between 3 - 5 on the pH
scale. Consult Thermal Solutions or a chemical
treatment company for buffering systems.
CAUTION
Do not use material that is not approved for use
with flue gas condensate for condensate piping.