Howdy,
We are struggling to design a system that would work without room thermostats. The simple reason is that HVAC contractor that did the rough in installation (pex tubing, forced air system) didn't put any thermostat wiring.
Out of 7 zones, only 2 have thermostat wires (only because they have thermostats for central air).
We will use a Trinity Ti100 modulating/condensing boiler in this ~3600sqf house, about 50K BTU/h heat loss. It requires a primary loop without mixing valves.
There are 3 floors:
- 1st on slab, with 5 loops, 1 or 2 zones (depending on controls restrictions - 1st zone would be kitchen/dining - 3 loops, 2nd zone would be 2 bedrooms - 2 loops)
- 2nd under subfloor w/plates 8 loops, 3 zones (5 loops in huge vaulted ceiling room zone, 2 loops in master bed zone, 1 loop in bathrooms zone)
- 3rd under subfloor w/plates 4 loops, 2 zones (2 loops in bedrooms zone, 2 loops in bathroom/loft zone).
This system obviously requires different temperatures for slab and 2 floors.
So far, I consider 2 options:
1. A 3 way or 4 way I-series outdoor reset mixing valves. Mixing temp automatically adjusted and based on supply, boiler return and outdoor temperatures.
2. Variable speed outdoor reset circulators. Output temp will be based on pump speed adjusted by supply, boiler return and outdoor temperatures.
I would appreciate an advice on both options (hey, maybe there's a better one) and controls for these options. All I am finding has thermostat terminals.
Also, any tips on Trinity boilers installs?
Thanks!
We are struggling to design a system that would work without room thermostats. The simple reason is that HVAC contractor that did the rough in installation (pex tubing, forced air system) didn't put any thermostat wiring.
Out of 7 zones, only 2 have thermostat wires (only because they have thermostats for central air).
We will use a Trinity Ti100 modulating/condensing boiler in this ~3600sqf house, about 50K BTU/h heat loss. It requires a primary loop without mixing valves.
There are 3 floors:
- 1st on slab, with 5 loops, 1 or 2 zones (depending on controls restrictions - 1st zone would be kitchen/dining - 3 loops, 2nd zone would be 2 bedrooms - 2 loops)
- 2nd under subfloor w/plates 8 loops, 3 zones (5 loops in huge vaulted ceiling room zone, 2 loops in master bed zone, 1 loop in bathrooms zone)
- 3rd under subfloor w/plates 4 loops, 2 zones (2 loops in bedrooms zone, 2 loops in bathroom/loft zone).
This system obviously requires different temperatures for slab and 2 floors.
So far, I consider 2 options:
1. A 3 way or 4 way I-series outdoor reset mixing valves. Mixing temp automatically adjusted and based on supply, boiler return and outdoor temperatures.
2. Variable speed outdoor reset circulators. Output temp will be based on pump speed adjusted by supply, boiler return and outdoor temperatures.
I would appreciate an advice on both options (hey, maybe there's a better one) and controls for these options. All I am finding has thermostat terminals.
Also, any tips on Trinity boilers installs?
Thanks!