HTP CGH-199*, Руководство по установке

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LP-644 Rev. 8.10.17
17
J. Wall-Mounting
The water heater may be installed on any suitable internal wall
(suitable sound-proofing may be required when installing onto a stud
partition wall).
The water heater must be installed on a wall that can bear its weight
(more than 100 lbs. when fully plumbed and full of water). Installing
the water heater on a wall which cannot support its weight could
result in property damage, personal injury, or death.
This water heater is too heavy for one person to lift. It is highly
recommended to install the water heater with two people. Use
caution as to not drop the water heater, which could damage the
water heater and cause property damage and/or severe personal
injury. Verify that the water heater is properly and securely mounted
before leaving unsupervised. Failure to comply with the above and
properly mount the water heater could result in substantial property
damage, severe personal injury, or death.
This wall mounting system is not seismic rated and should not be
applied as such. Failure to comply with the above and properly
mount the water heater could result in substantial property damage,
severe personal injury, or death.
Positioning the Water Heater on the Wall
1. Attach the wall bracket on the location where you want to
install the water heater. Ensure it is level and on stud (16”
centers) before proceeding.
2. Mark the four drill holes with a pencil or marker. Remove the
wall bracket.
3. Drill four (4) holes using a 5/32 drill bit at the marked hole
locations.
4. Mount the wall bracket to the wall with the four (4) included
anchor bolts. Ensure the mounted bracket is level. See Figure
5A.
5. Align the heater bracket grooves on the back of the water
heater with the tongues on the wall bracket and hang the
water heater on the bracket. See Figure 5B.
Figure 5 - Wall-Mounting the Water Heater
When installing a cascaded system, it is important that the water
heaters are the same model. Failure to ensure the water heaters are
the same model will result in improper system operation, wasted
time, money, and possible property damage and personal injury.
Such damages ARE NOT covered by product warranty.
Condensate Trap and Hose Assembly – Each water heater has
a built-in condensate trap to control the discharge of condensate
produced by the water heater during normal operation. A
corrugated condensate hose is also provided to ensure proper
drainage of condensate into the pump or drain.
Low Water Cut Off Probe – LWCO is provided with each water
heater to ensure the heater has an adequate water level to eliminate
overheating and damge to the heat exchanger.
Pump Service Mode –
Allows manual operation of pumps to
commission system and check pump operation.
Cascade Operation - This water heater can be configured to run
with multiple units in a Cascade System. In a Cascade System,
multiple water heaters are installed, piped, and wired to cooperate
in a single system. This provides many advantages over a single
large capacity water heater, including increased turndown, system
redundancy, and increased efficiency. A maximum of sixteen (16)
water heaters can be controlled by a single water heater designated
as the “Master”. Other connected water heaters are designated as
“Followers”. A DHW sensor / aquastat / or system sensor must be
wired to the Master unit.
The Master controls the operational run time of the connected
Followers and modulates the connected units up or down to ensure
the units are putting only the needed energy into the connected
storage tank, and also to ensure all connected units get even run
time to balance out service requirements.
When the Master water heater receives a call for heat from the DHW
sensor / aquastat / or system sensor, the Master will energize the
lead water heater in the cascade system. In a new system start-
up this will be the Master. The water heater will fire at its ignition
speed and then modulate its firing rate to maintain the set point. If
the first water heater reaches 80% of its firing rate, the Master will
modulate down and split the load in half with the next unit in the
system service rotation. At this point, the Master will fire the second
water heater in the system. If there are more than two water heaters
in the system, the same principle will be applied. Once the lead
water heater reaches 80% of its firing rate, it will modulate down
and split the total amount of load by the total number of units in the
cascaded system.
If the set point still cannot be met, the Master will continue firing
more Followers until either the heat demand is met or all water
heaters in the cascade system are firing at the maximum rate.
As the heat demand decreases, all operating water heaters will
modulate down according to the heating load. The first water
heater to modulate down to 30% will shut off. The same principle
will be applied to the remaining water heaters in operation until
the setpoint of the storage tank is satisfied. When the demand is
satisfied, the water heaters will turn off.
If 0-10V is used, connect the 0-10V to the low voltage terminals
provided on the Cascade Master. The set point will be determined
based on the programmed parameters. If 0-10V is not used, a fixed
temperature set point can be programmed into the control.