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SlimFit
Series 3
SlimFit Control
SlimFit control Priorities & Input/Outputs
•
For heating installations with multiple systems, the SlimFit
control uses
PRIORITIES
tion of the systems.
•
The control's MAX and MIN time settings determine the
maximum and minimum times a system will be oper-
ated before being turned off to allow another system to
operate.
•
A typical example is DHW priority — heat demand from
the DHW system is given preference over space heating
if assigned to Priority 1.
•
Each PRIORITY has its own set of operating parameters.
•
The control prompts the user to select the system type
(finned tube baseboard, DHW, etc.) and is factory pro-
grammed with parameters suited to each of these system
types.
•
The user can also choose CUSTOM to create a system
type.
•
The SlimFit control provides up to three
single boiler applications and up to four priorities for network
boiler applications. The order of operation is:
•
Single boilers: PRIORITY 1, PRIORITY 2, PRIORITY 3.
•
Network boilers: LOCAL PRIORITY 1, NETWORK
PRIORITY 1, NETWORK PRIORITY 2, LOCAL PRI-
ORITY 2.
•
For each boiler in a network, this provides up to two
priorities, used for heating systems piped directly
LOCAL
to the boiler, such as DHW tanks.
•
priorities are used for heating systems con-
NETWORK
nected in the primary heating loop and supplied by the
boiler network.
•
Each boiler has three
OUTPUT 1, 2 and 3.
•
Control setup prompts the user to assign each of these
I/O pairs to a PRIORITY. The SlimFit control then knows
which system (priority) to operate when any input as-
signed to that priority receives a call for heat.
•
The SlimFit controls respond to heat calls based on the
order of the assigned priorities and the timings set for
each priority's operation.
Boiler circulator
•
The boiler circulator must be supplied by others.
•
The 120 VAC Dry contact for the boiler circulator is located
on the boiler's Expansion Module. For each of the priorities,
the control can be setup to run the boiler pump or to leave
it off. It is recommended to set Boiler Circulator to OFF for
directly piped DHW systems with its own circulator.
The boiler circulator must be installed and con-
nected. Flow through the boiler must be provided
during all times of operation. Failure to do so can
result in severe personal injury, death or substantial
property damage.
– 4 –
&
&
— ADVANCED mode
to determine the order of opera-
PRIORITIES
pairs (INPUT/
INPUT/OUTPUT
:
%
(continued)
Multiple boiler operation
•
The SlimFit boiler has an auto detection feature for multiple
boiler networks. The Master will automatically detect the
presence of the other boilers wired to the network.
•
There will be a 30 second to 1 minute period until the Master
may see the shadow boilers.
•
Each shadow boiler must be assigned a network address, from
2 through 8. The address for each boiler must be unique, NOT
selected for any other boiler.
•
Afterwards, the Master will build a network based on the
communications shared. If a boiler loses communication, the
Master will automatically re-assign the lost boiler to where
it was before once it is back on the network.
•
When network inputs turn on, the Master boiler will enter
the Network Modulation routine.
•
Using system sensors, the Master will modulate the entire
network to meet the energy requirements of Network Priority
for
1 and Network Priority 2 inputs when they are on.
•
When a Local Priority input becomes active (switch closes),
modulation for that input is not controlled by the Master,
but instead is left to that local boiler using its own local Heat
Exchanger Inlet and Outlet sensors.
•
Each of the three (3) inputs on the Master or any of the
Shadow boilers can be assigned as Network Priority 1 or 2
or assigned as Local Priority 1 or 2. Network Priority settings
are common across all the boilers. These Network Priority
settings can only be adjusted from the Master boiler.
Sequence of operation
•
Figure 22, page 42 is a summary of the operating sequence
for the SlimFit control.
•
The statuses shown appear in the display as the SlimFit
control cycles the boiler.
•
The display will display red (solid or flashing) if a problem
has been detected.
Outdoor reset operation
1. Calculates target temperature for space heating zones based
on outdoor temperature.
2. For an explanation of the target temperatures and associated
outdoor temperatures, see Figure 1, page 5.
3. The temperature settings discussed below are accessed in
the priority menu for the applicable system. For detailed
explanations of the priority menus, see Figure 31, page 52.
SUPPLY MAX
1. Set SUPPLY MAX to the required supply water temperature
for the system at design maximum heat loss (typically 180°F
for finned tube baseboard on new installations).
SUPPLY MIN
1. SUPPLY MIN should equal the desired minimum supply
water temperature for the system.
2. This could be set as low as 70°F, which would supply "zero
heat" when outdoor temperature is 70°F, because supply water
temp would equal room temp.
3. See examples in Figure 1.
Advanced Manual
Part number 550-100-569/0321
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