SWEP DB200

It is a condenser for chillers and heat pumps with two refrigerant circuits. Both circuits condense against one water stream in the same plate pack, which saves the space and the water piping of two separate condensers.

It is the wrong choice for a single-circuit machine, where the plain B200T on the same footprint carries more water, and for evaporator duty, where the DP200 and DV200 are the dual models to look at. It is also wrong for ammonia or deionized water, because the braze is copper.

DB200 is the model and size: the True Dual condenser on the 525 x 243 mm plate. x90 is the plate count, 90 plates in this case. Those two fields fix the footprint and the depth of the unit.

A complete nameplate carries more after the plate count: the pass arrangement, a material code, a pressure class letter and then the connections in port order. Send those too if they are legible, because two units that both read DB200x90 can still differ in connections. The Model Number Guide walks through each field.

The frame is built up to 202 plates, and the 16 configurations we have on file run from 50 to 200 plates, including 50, 90, 130 and 170.

Adding plates adds heat transfer surface and flow area together. Capacity goes up, water-side pressure drop for the same flow comes down, and the condensing temperature sits closer to the leaving water temperature. The costs are depth, weight and refrigerant charge. On a replacement, stay with the original count.

All of them measure 525 x 243 mm. The B200T is the standard frame with 316/316L plates and a published maximum flow of 192.41 GPM. The F200T, P200T and V200T are evaporators on that frame, also at 192.41 GPM, with 304 plates on the F200T and P200T.

The dual family - DB200, DP200 and DV200 - all carry 118.88 GPM, 316/316L plates and copper braze. Within that family the DB200 is the condenser and the other two are evaporators. The letters after the D are what you match, not the size.

SWEP publishes the weight as 9.30 kg plus 0.4 kg per plate. A 50-plate unit works out to 29.3 kg dry, a 130-plate unit to 61.3 kg and a 200-plate unit to 89.3 kg, before water and refrigerant.

That is too much to hang on the piping. Carry the unit on a bracket or base under the plate pack and support every line independently, so the connections see no load. On a two-compressor machine there are two discharge lines feeding it, each bringing its own pulsation. Vibration carried through unsupported lines is what fatigues the braze joints at the connections, and the crack shows up as a refrigerant leak at the cover plate well after the change-out.

No. The 27 m3/h (118.88 GPM) figure is a ceiling set by the ports, not a design point. A condenser selected near that flow usually shows more water pressure drop than the pump was chosen for, and port velocity becomes the limit before heat transfer does.

Size from the heat rejection, the entering and leaving water temperatures and the pressure drop you can spend, then check that the resulting flow sits comfortably under the ceiling. If it does not, the answer is a larger dual frame such as the DB400, not more plates on this one.

The designations on file for the DB200 give model and plate count only, so read the pass field off the nameplate rather than assuming it. It follows the plate count after a slash.

It matters because the pass arrangement decides where the connections are. A single-pass unit has all its connections on one cover plate; a multi-pass build routes the fluid back and forth through the pack, lengthening the thermal path at the cost of pressure drop, and puts connections on the back cover as well. Swapping one for the other means re-piping.

These models are catalogued alongside the DB200. Each has its own page with its dimensions, materials and part numbers.

SWEP B200T - Dual-over-two-pass on the 525 x 243 mm frame.

SWEP DP200 - True Dual brazed plate evaporator for chillers and heat pumps, 525 x 243 mm, up to 202 plates.

SWEP DV200 - True Dual brazed plate evaporator for chiller and heat pump applications, 525 x 243 mm.

SWEP F200T - A copper-brazed 304 stainless evaporator with solder connections for chillers and heat pumps.

SWEP P200T - Brazed plate evaporator with long thermal length, 525 x 243 mm, up to 250 plates, solder connections.

SWEP V200T - Evaporator on the B200T frame, 525 x 243 mm, up to 250 plates, 192.41 GPM max flow.