Dunkirk ARTESIAN 220, Installation And Operating Instructions Manual

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VIII Start
up and Check out
IMPORTANT
IDENTIFY ANY LEAKS, BY TESTING, BEFORE PROCEEDING FURTHER.
WARNING
NEVER ATTEMPT TO FILL A HOT BOILER.
1) Be sure to purge all air from water heater and ancillary piping.
2) Be sure that all electrical wiring has been done according to the local codes.
3) Verify that all zone valves or circulators operate properly when their thermostats call for heat. Allow the
zones to operate long enough to purge any remaining air.
4) Set the water heater tank aquastat to the desired temperature setting. Then set the boiler aquastat to
20°F higher than water heater aquastat. To achieve the ratings listed in this manual it is recommended
that the aquastat should be set at 180°F, and the boiler aquastat should be set at 220°F.
5) Be sure that the water heater aquastat cycles the boiler properly, and that the system reaches and
maintains the desired temperature.
Appendix A: Whirlpool Sizing/ Hot Tub IMPORTANT
This procedure is not intended to size Whirlpool tubs in commercial applications. Commercial Whirlpool
tubs present special sizing problems because of the large rate (as much as 20 GPM) at which they fill. The
following procedure is predicated upon a water heater supply temperature of 140°F.
Before using this procedure, it is important to determine whether the tub in question is a Whirlpool tub or a
"hot tub". A hot tub has its own water heating source and is not refilled each time it is used. In this way it is
like a miniature swimming pool. Do not attempt to use this procedure for a hot tub. A Whirlpool tub is refilled
each time it is used and in this way resembles an over-grown bathtub.
1) If not already done, use one of the procedures in
Part
III to size a water heater boiler combination for all
fixtures except the Whirlpool tub.
2) The water heaters are ideally suited for most Whirlpool tub applications. This is due to minimal amount
of recovery time required by the water heater.
To size the water heater for a Whirlpool tub application, consult the tub manufacturers literature for the flow
rate. Match the flow rate to an acceptable flow rate found in Table 1. Take the first hour ratings at 140°F
from Table 1 and divide by 60 to obtain gpm flow rate.
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